Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc62f6afadadd48…

MALICIOUS

PDF

41.1 KB Created: 2020-08-03 06:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aaac14e29aee4360345103e8f409216 SHA-1: 3e5bcd5479c7f70ca48332edcbd8599cb69a29d7 SHA-256: 5dc62f6afadadd487d328e18f4b84f9af0807ebd06901bcd56094110cb845ac1
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One prominent link, 'https://ttraff.cc/pify?keyword=cub+cadet+lt1045+parts', is identified as a malicious redirector. The document's structure and the presence of a malicious redirector suggest it is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. No scripts were extracted, but the overall pattern indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=cub+cadet+lt1045+parts
    • http://files.shirehistory.org/uploads/1/3/1/4/131437041/1e6cbc3e986abf1.pdf
    • http://files.acam-ceo.org/uploads/1/3/1/0/131069899/67e59e5e37.pdf
    • http://files.chattanoogaaudubon.org/uploads/1/3/0/7/130740551/776a14316461.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2913/5514/files/tiladagapile.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/xunowikukufezogonipo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/botijefivi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8944/3483/files/kazosolal.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/43016097414.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/tisaxuregibitumewafolezaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/2110/5309/files/fikovideloxomevate.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3349/files/kuditoresawodekulupelotob.pdf
    • https://cdn.shopify.com/s/files/1/0428/8787/2671/files/stony_brook_textbooks.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56966684837.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_off00005a55.bin
61515451d0fd82cb6320683690b45d65dabce7b7be0674b916c15bbdb4cf0a00
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A55 5516 bytes
font_01_sfnt_off00006d20.bin
404ae7610b698b7472a0b73aab1c6c378f89fbc73989078b91ff75fee4be1549
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D20 13284 bytes