Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7762325a8ad8d8…

MALICIOUS

PDF

52.2 KB Created: 2020-07-30 15:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3664e33549801449fb59c901081c1828 SHA-1: aebd90ec52df52c65936e192291a995bff305b2b SHA-256: 0c7762325a8ad8d8bb67be0d644b21245c03e174895061ba4d1135b15dfa5034
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a redirector to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to game search engines for distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware delivery lure.

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.com/pify?keyword=alabaster+girl+pdf+download
    • http://files.pamellaallen.com/uploads/1/3/0/7/130740191/cf09aad1529d8.pdf
    • http://files.tsimshian.ca/uploads/1/3/0/9/130969310/zuluwosogi_vagef.pdf
    • http://files.buildmycapital.com/uploads/1/3/1/4/131452961/5141169.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4121/6929/files/32116558870.pdf
    • https://cdn.shopify.com/s/files/1/0429/4773/9811/files/56165047057.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1384/files/91467710323.pdf
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/93196168457.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/43677869183.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/vasagis.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/majefuxewov.pdf
    • https://cdn.shopify.com/s/files/1/0431/1010/5237/files/jurimetefon.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/34137181228.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/lidokoxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/baturowuve.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/61770996263.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_off000086b8.bin
96d3fabc70d1b420d4e33553d81134ce7f3c6f046b7d3787ae5c1cea200fee07
pdf-font-stream PDF embedded font (sfnt) at offset 0x86B8 5220 bytes
font_01_sfnt_off0000988f.bin
6ae5d852c30b8b918de82d4d33b562deecc14b948a1460e7c4274f8021bb7e17
pdf-font-stream PDF embedded font (sfnt) at offset 0x988F 13424 bytes