Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3c34413c802b60…

MALICIOUS

PDF

47.7 KB Created: 2020-10-25 07:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 62fcf1b6f990fb2e567d4d5954e1915c SHA-1: 814a87b861a725327361d6a0d4f57417ad928d5e SHA-256: ac3c34413c802b6003d32ce8be8cfc406630144b7dd3e576e47b64a2046cb4ea
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple links to external resources, with one prominent link leading to a known malicious redirector. The document body also contains the same lure text and URLs, suggesting an attempt to trick users into downloading potentially malicious software or visiting compromised sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/123?keyword=trustlook+security+pro+apk+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f8ec087a4a9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_5f939d13039e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_5f922f3eb0dde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5f931cac8d844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f88466700e64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fofeguj/62247566818.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/firokufatixaveredapage.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/xojorufamemavadosilifidad.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/50084988364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0749/0199/files/best_paid_hack_and_slash_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5744/6050/files/certificate_of_good_standing_california_bar_exam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3390/1256/files/breaking_of_dawn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4596/7256/files/50677655827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6310/7480/files/spikes_tactical_lower_parts_kit_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/certificado_medico_gratuito_bolivia.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/types_of_marketing_information_system.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/lux_meter_calibration_certificate.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/tisoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8852/0382/files/the_standard_view_of_science_is_that_it_is_non.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3508/5978/files/download_game_offline_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4899/files/2001_vw_jetta_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7239e961-12dd-4e44-b23b-579ee15a61ca/44262032673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f74afb-a480-4f35-b047-31e34a3f8920/miguel_brito_bastos_curriculum_vitae.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/632185ee-a93e-47a7-b0b4-d55efb68d363/vubofirevonolabidobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f873b6-c564-49f0-81b1-7d8b0aa20aef/91617258941.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6457 5356 bytes
SHA-256: d7f5f0928e228cde7873da88f717bcf2159e94c1bc9fc33e5e429997cf9e3b9d
font_01_sfnt_off000076ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BA 10652 bytes
SHA-256: 07dc8e2194b57ed3c1fe97b6098c46db4375027d386c2a5119a2334f0d9ce24c
font_02_sfnt_off00009b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9A 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b

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