Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b400ff9c23d2a82…

MALICIOUS

PDF

47.7 KB Created: 2020-08-20 11:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 26fec69ac9280f84f11fdae26eb3fc4b SHA-1: 248c1cdb49c4f4630eb3d8c2e0c0402c6ee18a63 SHA-256: 9b400ff9c23d2a82ef3a988d397fdbbbbb03bbdb78781c0e5edd54983c64a6b7
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link to 'ttraff.ru' and a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=adrenal+insufficiency+pathophysiology+pdf', indicating a lure to a malicious site disguised as a document about adrenal insufficiency.

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=adrenal+insufficiency+pathophysiology+pdf In PDF document text
    • http://files.architecturaldesigner.world/uploads/1/3/1/3/131384101/6265fedcfcd2d65.pdfIn PDF document text
    • http://files.inyourpot.com/uploads/1/3/1/6/131606025/ruwurafupu_bifivuxifuxikas_desejaje.pdfIn PDF document text
    • http://files.c3classes.com/uploads/1/3/2/6/132682861/f5a8ee738.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/1/0435/0279/6964/files/29108496698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6025/5137/files/biriyani_hd_video_song_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/xokuwizokap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8611/7032/files/baldur_s_gate_2_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/51687589381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9989/6475/files/95285204083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0799/1195/files/mufokenitabalolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/statistical_rethinking_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/danagosaxofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/luvumup.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 6

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_off0000730a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x730A 5508 bytes
SHA-256: 9b0ae9fddb298315fc6d31b9aabad4f36ce25f3460ebad6a59a784fe54c5be1f
font_01_sfnt_off000085c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C3 14360 bytes
SHA-256: 703b5aa12396a787aecf197aab9d5bdcb5fa503bd601f18ec73b6d344924bb21

Open this report in the interactive analyzer, or submit your own file for analysis.