Malicious PDF — malware analysis report

Static analysis result for SHA-256 8729c3d5e606ba29…

MALICIOUS

PDF

50.1 KB Created: 2020-08-17 14:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 28c5b209faf37976654858b3323498d9 SHA-1: eecba38357a51425a2ae59ecdb5d41962ffd9c8f SHA-256: 8729c3d5e606ba29cdef327008098922f5fecc6faa604213146a2a99c473f1b5
214 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, specifically pointing to a redirector URL. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary goal is to redirect the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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) or Microsoft license-boilerplate 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.ru/pify?keyword=msds+safety+data+sheet+pdf In PDF document text
    • http://files.naomijacksonwrites.com/uploads/1/3/1/4/131408170/1789091.pdfIn PDF document text
    • http://files.child-poverty.org/uploads/1/3/1/3/131397927/1342505.pdfIn PDF document text
    • http://files.sweetbeesushoney.com/uploads/1/3/1/3/131398000/6304155.pdfIn PDF document text
    • http://files.rachelbrauer.com/uploads/1/3/0/7/130740264/vinibiwekamitivimibe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1157/9809/files/persona_moral_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2691/3179/files/acknowledgement_for_a_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/15354905288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8941/2764/files/tsc_appraisal_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3542/1846/files/lord_of_the_rings_concerning_hobbits_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/1717935510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/basic_engineering_drawing_book_in_gujarati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5828/9045/files/wojesiroxuzixiwud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4847/5541/files/99593781692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4428/1247/files/john_deere_la130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2338/2174/files/certificado_de_origen_mexico_colombia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7451/8180/files/14218488145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/arabic_to_urdu_dictionary_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/34412029079.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E2 5108 bytes
SHA-256: cbdcc21cbfec4c9f0d674779d0e11299a666e08fc6bd4c1993805c6a50a46bbb
font_01_sfnt_off00009853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9853 10360 bytes
SHA-256: 6695dc764bb02d77106a2804a2c056c0799f83d8a7e16de8044677dc95f0bab9