Malicious PDF — malware analysis report

Static analysis result for SHA-256 80acec737325c37c…

MALICIOUS

PDF

38.8 KB Created: 2020-08-17 04:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4945e67f4259aa287510eaabec3f5208 SHA-1: 5260f22bad98365b59f24c44bbb1a51e32d0ac79 SHA-256: 80acec737325c37c6278c6406112a54502d2ca748578cd6e5bb42b1a48bd2411
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or redirection attack.

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=devexpress+spreadsheet+column+width
    • http://files.brandonrdavis.com/uploads/1/3/1/8/131856877/fojuj-suguvivotikav-pomuvisiwuxekep-loneba.pdf
    • http://files.sanctuaryofgrace-in.org/uploads/1/3/1/6/131606128/tumipividuxusu.pdf
    • http://files.tannersjourney.com/uploads/1/3/1/4/131453934/6558320.pdf
    • http://files.catchmekissme.com.au/uploads/1/3/1/3/131384229/41a50409d2392.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/wuxupazonajori.pdf
    • https://cdn.shopify.com/s/files/1/0441/4459/1000/files/2278250231.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5967/files/remove_files_from_git_add.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/rixiwanemurazurefude.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/88243265392.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/poberumu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1692/8923/files/gijopukewiwudigakebuze.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/26665036600.pdf
    • https://cdn.shopify.com/s/files/1/0439/0957/8904/files/scientific_names_of_plants_list.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_off00005a52.bin
0f93b64dd2e23f2483bbd438a488de107ea17065cab58513ce16a673ddd12f81
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A52 5532 bytes
font_01_sfnt_off00006d12.bin
165d3299d52de6ab22353c3703588fa11ad12ed14c1f7a25fbfc4262bddee58e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D12 9768 bytes