Malicious PDF — malware analysis report

Static analysis result for SHA-256 35bc827bd3588a0b…

MALICIOUS

PDF

42.1 KB Created: 2020-08-10 17:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f1b24673b78112ddead39c9d6ee4ad2b SHA-1: ce90b123162e34894746979b6324e5208a18fe90 SHA-256: 35bc827bd3588a0b809eea419f3320f8250eeb68a12fe5e0456e70e2c9f2b61b
202 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text suggesting it is a downloadable PDF related to exam preparation, and the presence of a 'download' button lure reinforces this deceptive approach. The primary malicious URL identified is ttraff.ru, which is used to redirect users to other potentially harmful content.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=parajumble+questions+for+ibps+po+pdf In PDF document text
    • http://files.bhurbanhillapartments.com/uploads/1/3/2/7/132740978/2785935.pdfIn PDF document text
    • http://files.gerdesgala.com/uploads/1/3/1/4/131437941/noxomagas_genoj_xekoru_zagab.pdfIn PDF document text
    • http://files.villadesbambous.com/uploads/1/3/1/3/131379622/7807861.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/1/0441/0900/4952/files/causes_of_multilingualism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9784/7976/files/pdf_file_convert_to_jpeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2565/3160/files/call_upon_the_lord_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2400/6823/files/79348699545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/mexixixugademadavasuzabug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9756/8920/files/bike_parts_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/fepuzanujisir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/9890759508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/bheemili_kabaddi_jattu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/42522136932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/neremefedepulejonilepufed.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_off0000663d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663D 5528 bytes
SHA-256: 599101c4f634a73aa286740635fbd7eb890b28a070a1f740756f70b846b5e11c
font_01_sfnt_off000078ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78ED 10192 bytes
SHA-256: 83b3e86601c605b7f6f772032a97235624407ef91d0589e970de5b388a67fb8b

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