Malicious PDF — malware analysis report

Static analysis result for SHA-256 61fe1c9f4abd9df1…

MALICIOUS

PDF

53.5 KB Created: 2020-08-28 07:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43578cb29d92c476ca83450ec305252a SHA-1: fdff38672b26d5f5f56b39d4ac8c8e885da94dcf SHA-256: 61fe1c9f4abd9df1434fe90c1208e161d130d02601ce5f45f5c16489792ca357
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains a URL that matches this finding. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. The SE_CALLBACK_LURE heuristic further suggests a phishing or scam pretext.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=ada+douglas+wetherill
    • http://files.concretesaturdaymarket.com/uploads/1/3/1/3/131380279/6080064.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/filirem.pdf
    • https://cdn.shopify.com/s/files/1/0437/8991/0167/files/63370044711.pdf
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/vesogepekibor.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/norusotege.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetidolurat.pdf
    • https://cdn.shopify.com/s/files/1/0434/2074/5893/files/wuduwaf.pdf
    • https://cdn.shopify.com/s/files/1/0456/4549/6487/files/magic_item_compendium_3.5_ocr.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/noel_jones_manual_for_preachers.pdf
    • https://cdn.shopify.com/s/files/1/0438/8664/1304/files/77535516726.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1239/files/free_avery_5160_christmas_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/9729/2949/files/cold_war_timeline.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/52922760752.pdf
    • https://cdn.shopify.com/s/files/1/0465/1991/0558/files/bejazamupubetufoki.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000094e7.bin
3bc97a6af491ab9c6ba26ac731d4d37bb0493f97123f98e240052513d6db237c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94E7 5168 bytes
font_01_sfnt_off0000a686.bin
b8855fc0c32b7b3d2c103095dd334a17ffb2b6cb21b32c6b312bf6558e7b8bd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA686 10356 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.