Malicious PDF — malware analysis report

Static analysis result for SHA-256 7886d93e9bbc70bb…

MALICIOUS

PDF

49.3 KB Created: 2020-08-15 09:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb93025b664cfa51b96b6eea5420eb27 SHA-1: dd1a178e801a837be26a6ab83f3450fa1f5d089b SHA-256: 7886d93e9bbc70bbcd9f6da9b43a3c9a70722e2a6cb01b918ced9c58a1ea16c1
202 Risk Score

Malware Insights

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

This PDF file contains numerous links designed to appear as academic resources, but they ultimately redirect to a malicious domain, ttraff.cc. The document body and heuristics indicate a lure for users searching for specific academic papers, likely to trick them into visiting a malicious site. The presence of embedded URLs and the ML classifier strongly suggest malicious intent.

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.cc/wb?keyword=cusat%20question%20papers%202016%20with%20solutions%20pdf In PDF document text
    • http://files.t3chlan3.com/uploads/1/3/0/9/130969059/7253293.pdfIn PDF document text
    • http://files.traumayellow.com/uploads/1/3/0/7/130776749/7203234.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/1/0429/4141/5587/files/gilipurinutedojatobaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/numpy_count_nonzero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4633/7693/files/ffxv_chocobo_race.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9648/7576/files/hubble_telescope_images_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/dudilapixalejavil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5797/0329/files/boris_vian_livres.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/rikakikanomogijatino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5137/7049/files/12659726121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9051/7917/files/53324536965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0818/6792/files/toefl_speaking_topics_with_answers.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 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4A 5732 bytes
SHA-256: d58377f774f7918a60ff64bf5c444ced78261d44045155479ae91a6fdc315eb1
font_01_sfnt_off00007ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDE 13092 bytes
SHA-256: b7e77795e83f6ddd146d809b0a9cf356ae033b712a8af118dba89d2ac79fd2a7
font_02_sfnt_off0000a81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA81E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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