Malicious PDF — malware analysis report

Static analysis result for SHA-256 77a812b4c9513e3f…

MALICIOUS

PDF

53.2 KB Created: 2020-08-16 19:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b786bedde6b73d48c4eb0e4379f59029 SHA-1: 1cbec7b0d7d4ba3340a95c4d131be13691bd565c SHA-256: 77a812b4c9513e3fbce5da58676002601c550e2aa3ce6a348b5cf907607d5818
194 Risk Score

Malware Insights

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

The PDF contains a deceptive document body and numerous embedded links, including a critical redirector link to traff.com. This suggests an attempt to lure users to malicious or SEO-farmed content, potentially for phishing or malware distribution. The ML classifier strongly supports 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.
  • 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.com/pify?keyword=apache+server+etag+header+information+disclosure+tenable In PDF document text
    • http://files.audreyaliwarga.com/uploads/1/3/2/8/132814990/mapefe.pdfIn PDF document text
    • http://files.bethelroyalheirs.com/uploads/1/3/0/8/130874143/7727158.pdfIn PDF document text
    • http://files.mhfirstresponse.org/uploads/1/3/0/9/130969377/xegepobavilu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7437/8138/files/rodaxobumofikutewufutiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1025/1176/files/66884554368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0519/0041/files/comment_fusionner_2_en_ligne.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/convert_html_to_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/84025918114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/kiniru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/janariru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1445/3410/files/46482924885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/dalafa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E23 5640 bytes
SHA-256: 188a32abc5f0880e9b46440012ef1fc86bdea91aafd8076ff30e4d6da993b85a
font_01_sfnt_off00008115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8115 2004 bytes
SHA-256: 1ccfdb965ac1c7a735855f6c27e3edda1425c3432a388fdbc3eb9e884b12240a
font_02_sfnt_off00008aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAC 14876 bytes
SHA-256: 76cdb4792e5b4f0446fd10510168f6c7e9745abd2c9c63db6f29072b55f525a2
font_03_sfnt_off0000b8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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