Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae1e735fc77ae8d9…

MALICIOUS

PDF

114.5 KB Created: 2020-10-27 00:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 52e95be27af49afbf9d89e8c59c3ab1d SHA-1: 1693ef944accaf8f24239a0dbc6b3f20770018ca SHA-256: ae1e735fc77ae8d93ad5da9e638da4a3708bba181f8b30ba33925349e3da21f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure. The ML classifier strongly indicated maliciousness. The embedded URL 'https://gettraff.ru/strik?keyword=clone+hero+highway+spins' is likely intended to lead the user to a malicious site, potentially for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest an attempt to drive traffic to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?keyword=clone+hero+highway+spins In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_5f88f1f985271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_5f91b82b1ffba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/gojosoresewafu.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/56246935492.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/17372823030.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/xikibusujaxufeligav.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/jitutomuzotademokuzojilun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7274/2088/files/the_number_of_units_produced_does_not_affect_net_operating_income_when_using.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2028/2787/files/i_am_stuck_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc3fc44-b94b-433f-a60f-c44dd3a2f537/fifafezetezexug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e930f142-36ac-47a9-ade7-6155357e56c0/91567529393.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/bronchopulmonary_dysplasia.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/tagewigizafufarofelawa.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/24795183722.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/polynomial_and_rational_functions.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/zojow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0184/3359/files/bezegumebuvuporow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/best_battle_royale_games_for_android_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/90581107420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/5540/8071/files/bushnell_bore_sighter_manual.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17165 5180 bytes
SHA-256: f3542b3045c9f7997ccbd4d9b070a77b38fdef8fe331241e80ab2b2b2bedcc6d
font_01_sfnt_off0001830c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1830C 6212 bytes
SHA-256: 56109735220f61b47d8c7350342327a3aac7f5aad46f2c12354c31fb9ee47f87
font_02_sfnt_off0001933f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1933F 12244 bytes
SHA-256: 23605c9c3353592388d4676bd66a38461521c07316ce81d38bc5d0906389d9a9

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