Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b0fca15f33f870…

MALICIOUS

PDF

52.8 KB Created: 2020-08-19 15:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 300222d910c91caca666043ab96287e2 SHA-1: b5ff56d2f46121debf74c6c840dd41fa31ca8ae7 SHA-256: 86b0fca15f33f870158cd4e452823ba0cfd3d7537fa03a41f2997f405f204bee
194 Risk Score

Malware Insights

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

This PDF document contains numerous links to external PDFs, many of which are hosted on Shopify and appear to be part of an SEO link farm. The primary redirector URL, https://ttraff.cc/pify?keyword=fraction+and+decimal+equivalents+worksheet, is flagged as malicious. The document body, though heavily obfuscated, contains this same redirector URL and several benign-looking Shopify URLs, suggesting a lure to download further content or visit malicious sites. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=fraction+and+decimal+equivalents+worksheet In PDF document text
    • http://files.bradysbendhistoricalsociety.org/uploads/1/3/1/6/131636651/fewegejodolip.pdfIn PDF document text
    • http://files.thecompanyofgoblins.com/uploads/1/3/1/4/131453574/vulax.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/1/0433/0687/7080/files/wixet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/tajijamumoguranekaveroke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8472/6943/files/xoxes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/lamijoduruzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/nordvpn_coupon_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2325/1094/files/apostila_mecanica_automotiva_senai.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4965/5203/files/learn_autodesk_maya_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/archery_fight_master_3d_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/james_hadley_chase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0532/8034/files/rivibozede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/43700931810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0177/3212/files/browning_pistol_vault_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/4569/4112/files/basin_street_blues_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7679/5030/files/toxicwap_music_videos_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B49 5476 bytes
SHA-256: 6b84d04bb56dbf75153d540a67348a5fdc6f8fd2800c0aeade816b0546f0e027
font_01_sfnt_off00007dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCB 14940 bytes
SHA-256: 83cf74bb827de2a6a21f89a1600b30b0f125ed8d3374b080a9236411bf8e7344
font_02_sfnt_off0000ad02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD02 16456 bytes
SHA-256: d2bc5d64f86936baa8a535598807aaf818ee2625d35624d3e60802d888bb1e60