Malicious PDF — malware analysis report

Static analysis result for SHA-256 8938f75f834d81b0…

MALICIOUS

PDF

37.5 KB Created: 2020-08-08 19:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3c1904f149861a26ce22447404a88ad3 SHA-1: 7165b3e73c603e7016d52c85f7b61cc36adf5b31 SHA-256: 8938f75f834d81b01409473351640b1efa2d64545c52aae0738b9e2bb1c1a37f
194 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which point to a redirector service known for hosting malicious content. The primary redirector URL is https://ttraff.ru/pify?keyword=tutorial+agisoft+photoscan+espa%25C3%25B1ol+pdf, which is designed to lure users with search engine optimized content. The document body, though heavily obfuscated, also contains this URL, indicating its central role in the attack. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.ru/pify?keyword=tutorial+agisoft+photoscan+espa%25C3%25B1ol+pdf In PDF document text
    • http://sepasutad.foundationsfirst-ni.com/uploads/1/3/0/7/130739625/4446385.pdfIn PDF document text
    • http://files.ssndesigns.com/uploads/1/3/2/6/132695738/votawaves.pdfIn PDF document text
    • http://files.thsbaseballdugoutclub.org/uploads/1/3/0/7/130776175/1c851578a.pdfIn PDF document text
    • http://files.michaelandsydneylovepi.com/uploads/1/3/1/4/131482953/613ce0fe.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/1/0433/3545/0774/files/8358845578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/fekufupogubafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/97692145623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/71741757271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/html_canvas_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/18948036143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0003/5485/files/xetofapufigimer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8262/6710/files/tusoxawete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4836/1375/files/balanceamento_de_equaes_quimicas_exercicios_com_respostas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/abide_in_christ_murray.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/52529205811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6229/6725/files/56923992428.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45C7 5460 bytes
SHA-256: 0ce5ad703272a4ff8f35879cc669ca34d014c1dc1511a6d104deca5a67070218
font_01_sfnt_off00005808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5808 9800 bytes
SHA-256: 1b21e5350da1ad89203e7663a6aae72e8194cc576c3559764bdd3a6955872152
font_02_sfnt_off00007870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3