Malicious PDF — malware analysis report

Static analysis result for SHA-256 4046e32354572040…

MALICIOUS

PDF

43.7 KB Created: 2020-08-25 11:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fc11864aacb146714632093e9b66b1e5 SHA-1: 247c0ec55433f123421a7922992599f1ae28fd0d SHA-256: 4046e323545720406dc052462e2e937450ade85d4b3b16764431af18a97512b5
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external links, one of which is to a suspicious domain. The document body contains text related to 'Baidu app for android' and the authoring application, suggesting a potential lure.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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=baidu+app+for+android In PDF document text
    • http://rumun.privatecounsellingandmediation.com/uploads/1/3/0/7/130775565/6f575.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/1/0428/2833/3212/files/82386767658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2838/0839/files/genetically_modified_organisms_gmos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/building_facade_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/lopiduvosorijuxolozizum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/ragowagasulexedave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3225/5392/files/7435813368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1301/2630/files/sojagopabarelejujida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7053/5318/files/witudetalotevovukivowid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/xemebipokuziwoluligovuvab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7351/9269/files/635577497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2653/5832/files/song_hallelujah_by_funbi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2973/2245/files/human_anatomy_4th_edition_mckinley.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/43325130570.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA8 4872 bytes
SHA-256: 0e073bbcad87334d0afdce8193e899e7417bb8625002a909191465bde388429f
font_01_sfnt_off00007f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F48 10244 bytes
SHA-256: 64953018d05c2ef16ae292463354c1d52417fec536c1b0cc57c25857f4193b40

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