Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a7efd7ec12a02c…

MALICIOUS

PDF

34.7 KB Created: 2020-08-19 08:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c4b45323b7e9847145b735c2bd81837a SHA-1: 4f254b10bef76a2e881a7c43eca13c19682f484b SHA-256: f6a7efd7ec12a02c921ca002082965c60565bd733e778dc37dbe83c7c0fdd425
202 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains text suggesting a lure for 'prepositions of place exercises with answers pdf', and also embeds URLs that appear to be part of an SEO link farm. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of 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.ru/pify?keyword=prepositions+of+place+exercises+with+answers+pdf In PDF document text
    • http://files.profilesbylynn.com/uploads/1/3/1/3/131398385/fcd3ff404e83.pdfIn PDF document text
    • http://files.mmsoundandlighting.com/uploads/1/3/1/3/131379396/4521139.pdfIn PDF document text
    • http://files.coastalleadership.net/uploads/1/3/1/4/131406498/nobodat.pdfIn PDF document text
    • http://files.osbornelumber.net/uploads/1/3/0/8/130813413/308061.pdfIn PDF document text
    • http://files.thegreensheep.ca/uploads/1/3/2/3/132303406/a54255fd28bc.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/1/0430/4273/4237/files/tatikudulezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64831632673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1466/8959/files/12278459972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/xupumojiguronetewowizag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/tudupowoxupowovazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/74749914568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9853/8151/files/7862506017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/74167554491.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 8

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_off000049d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49D1 5404 bytes
SHA-256: f414abee0d9c4b5b2cacbe8423873f8503d0d7eaa0fca57ad7bb172b3ec4ceb0
font_01_sfnt_off00005c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C32 9868 bytes
SHA-256: 4d9eff4a369b542c50a5f708b937eedf3baf4ed5b96f8ecff55c0fba9decd8cb

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