Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e376d75d1d9f3e…

MALICIOUS

PDF

44.9 KB Created: 2020-08-08 09:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3309679e1819fe3a1ec2de8bb5c6e7ec SHA-1: 4537ebe93fe67a918dd72b8330ae34aff7e98cc0 SHA-256: 14e376d75d1d9f3ee87e138da7e59ef2776218103ccb747d5cc06d7f845a3e3a
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The heuristic 'SE_CALLBACK_LURE' suggests a phishing or scam pretext, likely aiming to trick the user into clicking these links. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lead the user to malicious infrastructure.

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.com/pify?keyword=advanced+accounting+concepts+pdf
    • http://files.leilatualla.com/uploads/1/3/1/4/131437513/fe1991f746.pdf
    • http://files.caribbeanpsyarts.com/uploads/1/3/1/4/131437987/0c470a891690c1.pdf
    • http://files.agorapodcasts.com/uploads/1/3/1/8/131872087/wizutotafadit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5180/9942/files/torawiwubibiboramat.pdf
    • https://cdn.shopify.com/s/files/1/0434/3755/5864/files/how_to_convert_odt_to.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5255/files/43261153961.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2646/files/mepegupufenu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7599/files/63527394158.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/60882619662.pdf
    • https://cdn.shopify.com/s/files/1/0432/4406/0839/files/joint_venture_accounting_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/1479/1068/files/15620147265.pdf
    • https://cdn.shopify.com/s/files/1/0433/0618/8955/files/10534272636.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96704933611.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/javascript_fetch_example.pdf
    • https://cdn.shopify.com/s/files/1/0439/2858/4347/files/82442735802.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/85490447420.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/26820998716.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006700.bin
3d9a3424df478546dc4068d0e985da83724db437dddac2c4f2085f32a20d8103		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6700 5124 bytes
font_01_sfnt_off0000788a.bin
e1db32f512748cb6eedd56dce0286cb2ac3761962d4e2686f99834e900064e22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788A 9320 bytes
font_02_sfnt_off00009873.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9873 4324 bytes

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