Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abb1b052a52572a…

MALICIOUS

PDF

44.0 KB Created: 2020-07-09 01:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14f4f8f716d3449b75ab10d6d9b01634 SHA-1: 8ec46baf84705fc64c61565791b0ec6bcbeeacac SHA-256: 5abb1b052a52572acc13149013799b2b3cf07cb8be992eff8cae34a74e360ed7
174 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDF files, suggesting a link farm or redirection to malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious redirector infrastructure. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, consistent with phishing or scam tactics.

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.cc/wb?keyword=benevolent%20fund%20form%20pdf
    • http://files.centennialneighbourhood.com/uploads/1/3/0/9/130969034/berekoxakazarizexexi.pdf
    • http://files.cityofbonham.org/uploads/1/3/1/4/131409244/e7bc3a70.pdf
    • http://files.tarotartist.net/uploads/1/3/2/6/132681938/8280551.pdf
    • http://files.alhoopingarner.com/uploads/1/3/2/8/132814969/4152563.pdf
    • http://files.allsoulsanimalrescue.org/uploads/1/3/0/7/130776266/2333799.pdf
    • http://files.seedschurch.net/uploads/1/3/0/7/130739315/tekejul_xudekovatilav_kimozetoto_dokizixuret.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://zirinajegupa.files.wordpress.com/2020/07/3087817861.pdf
    • https://pizitotilu.files.wordpress.com/2020/07/ripuzin.pdf
    • https://konoxadejuk.files.wordpress.com/2020/06/sitafataremizorofefowe.pdf
    • https://goladosi.files.wordpress.com/2020/06/54038360863.pdf
    • https://lovifame.files.wordpress.com/2020/06/14841976127.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90379225571.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zeranosorijajigafa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50751207741.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/33374625424.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_off000065fb.bin
d63f9d3abbdb37ae4e92c88fa6a4de84293ce17a0a7d9b90982fe4497b91bb2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FB 4740 bytes
font_01_sfnt_off00007608.bin
276b4d935f75b718334bbca5d693160f89772d890c63c5231bfd510e5cee7e54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7608 14300 bytes

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