Malicious PDF — malware analysis report

Static analysis result for SHA-256 4206d6556000b0aa…

MALICIOUS

PDF

47.8 KB Created: 2020-08-04 09:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 968064272ab22e15f15b42abc3d5e2c7 SHA-1: 0498a055b4fb467ec97389a46e435eb5012472c7 SHA-256: 4206d6556000b0aa4d24c43166169acb2d2777844cb3eb929e8fbe86760553d9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious Link

The PDF file contains a mass of external links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm or SEO spam campaign. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body also contains the URL "https://ttraff.cc/pify?keyword=mit+press+algorithms+pdf", suggesting a lure to trick users into clicking on malicious links under the guise of academic content.

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=mit+press+algorithms+pdf In PDF document text
    • http://files.janeelizabethstudio.com/uploads/1/3/1/3/131397981/8358516.pdfIn PDF document text
    • http://files.amandalevdesign.com/uploads/1/3/1/4/131438539/4486293.pdfIn PDF document text
    • http://files.afmsptsa.org/uploads/1/3/2/6/132682564/rikopekelofilolubip.pdfIn PDF document text
    • http://files.tepeyacinstitute.com/uploads/1/3/2/6/132681443/zajiw.pdfIn PDF document text
    • http://files.hamtramckpestcontrol.com/uploads/1/3/1/4/131453539/wowukum.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/1/0437/2017/9864/files/risejikaxugopifakovewikof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/nakegibivopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/33134197870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4583/8232/files/54514398893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/lotigorusefojopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/vakebog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/34804896640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1612/5590/files/mixobega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/tefelunefisuburuzeludogev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2017/3983/files/kazositobefatejejepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3331/8808/files/aadhar_card_form_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/wojifitasamelo.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 7

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_off00007aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA3 5460 bytes
SHA-256: 7dc789f0187496cd5a949d2fd0b6af3f56f4b112a1347ccf7a7c362b52e43d70
font_01_sfnt_off00008d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D12 10820 bytes
SHA-256: 70221519c3058a941f2a9a23e6029966a1fd47f494c883de1145fb30fefa7fd5

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