Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4354158d4bef3b…

MALICIOUS

PDF

43.4 KB Created: 2020-08-20 09:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d0b47724ab7997021c23354837f0d47 SHA-1: 3e5234077a8d2507e45b0c3c9576ef0ddcebcf8a SHA-256: bb4354158d4bef3b667708929ab1da1bdd3b8910c63fb7a0fa585cd59a6b9fbc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains this URL and references Google Sheets, suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious.

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=google+sheets+sum+between+sheets In PDF document text
    • http://files.tdsacanada.com/uploads/1/3/2/6/132681670/riridogunek.pdfIn PDF document text
    • http://files.europeandeliriumassociation.org/uploads/1/3/2/8/132814305/vasibuzigifig-xumapo-gamibagu-bupan.pdfIn PDF document text
    • http://files.hairandmakeupbydesire.com/uploads/1/3/0/7/130739693/bisutidok.pdfIn PDF document text
    • http://vekirugew.greenhillspediatrictherapy.com/uploads/1/3/1/0/131070450/9263459.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/1/0440/6679/9766/files/mapobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/wojegixosimanopukegizeva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/nolejimepepesofepepufuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0889/1807/files/79881860859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6296/6937/files/guwonojilakijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8904/9238/files/10029637090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/1122250705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3264/8602/files/kejerutegab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/merakirewav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4977/0399/files/learn_latin_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/wejuwezotuxovoxiwula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6222/3263/files/dell_poweredge_r730_owner_s_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5583/2471/files/sijapuzewafedozavolerumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2598/7746/files/15924815599.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_off00005fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB9 4888 bytes
SHA-256: bf1b31027b5509db49dcb18ff38adf25bdb8a9569a54292e751bdd20f28fee22
font_01_sfnt_off0000705b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x705B 10008 bytes
SHA-256: 23deba6e8fe106f5338f941941358cae41610bdde4f3d154204bdb0a20734dc6
font_02_sfnt_off0000929b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x929B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378