Malicious PDF — malware analysis report

Static analysis result for SHA-256 049eaa947069e98d…

MALICIOUS

PDF

41.4 KB Created: 2020-08-19 12:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 055f8e8e2b25e5428fd2f1d8da490da1 SHA-1: 52d1dd598696bb48583aaa4740f475cd91a99066 SHA-256: 049eaa947069e98d31e8c0cc7a51c9fc3b3e02b5fa581dfa85913b11a7682cc9
174 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure at 'ttraff.com'. The heuristic 'SE_CALLBACK_LURE' indicates the document's content is designed to trick users into calling a phone number, consistent with tech-support scams or callback phishing. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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=bb+9360+os+7.+1
    • http://files.peacelutheranconnersville.org/uploads/1/3/0/7/130740524/zapefope-vusepul-zerepukebalalu.pdf
    • http://nogusug.astoria2000.net/uploads/1/3/1/1/131164250/2877587.pdf
    • http://files.muskogeehauntedhistorytours.com/uploads/1/3/0/8/130815437/wijeranofebu.pdf
    • http://files.naughtyboysproduction.com/uploads/1/3/0/7/130776073/2836143.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/73303231654.pdf
    • https://cdn.shopify.com/s/files/1/0447/2075/0745/files/eje_renina_angiotensina_aldosterona.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/rikinulaju.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/acronis_2016_bootable_usb.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6056/files/22248591640.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/voith_cardan_shaft_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/74489209947.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/2293737925.pdf
    • https://cdn.shopify.com/s/files/1/0429/8234/2815/files/qualitative_research_in_counselling_and_psychotherapy.pdf
    • https://cdn.shopify.com/s/files/1/0432/5077/8269/files/milady_master_educator.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/61987620109.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_off000063d6.bin
d790d60cc18ed357892361d7ddb0ac675cdea69b4d294cc01dcb34a1eea03b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D6 5308 bytes
font_01_sfnt_off000075fc.bin
30a3a22e4f4677a0696a07e7f84b76f377b948de5268f863349a0552fdf0fce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75FC 10344 bytes

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