Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f8dfa5393728a5…

MALICIOUS

PDF

37.8 KB Created: 2020-08-19 08:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bda475b1d0a0f0d409c108500fda5d17 SHA-1: d6cdefa825cf4768623b9f1ea83a7a104da20924 SHA-256: 04f8dfa5393728a5068e0c588bbf7bb7a353eb700c52a7aef046518aff57a8b2
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a link farm or SEO spam campaign designed to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded links are the primary attack vector.

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=brother+anil+kumar+telugu+songs+free
    • http://mebup.mertzlab-biophysics.com/uploads/1/3/0/7/130776791/2435084.pdf
    • http://woxazeb.thebiocompatibledifference.com/uploads/1/3/0/9/130969090/mozakubidebumi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5879/7471/files/93113739558.pdf
    • https://cdn.shopify.com/s/files/1/0440/0332/8150/files/soil_mechanics_lab_manual_das.pdf
    • https://cdn.shopify.com/s/files/1/0439/5863/2606/files/69979946992.pdf
    • https://cdn.shopify.com/s/files/1/0439/3133/6859/files/dujewifixigibagopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/vekurajemagizefagafo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/dorisokafutogumowuberej.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/85082217937.pdf
    • https://cdn.shopify.com/s/files/1/0440/4009/3846/files/how_to_fix_rimworld_1._1.pdf
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/musebupapuvafuzakevepuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/9291/6891/files/cefaclor_375_bula.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7649/files/aptana_studio_3_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/32574053957.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_off00004a4a.bin
94aea4f047d5750baac3b9a56270a4c62fe85371058e1209123c1b59749cefd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A4A 5292 bytes
font_01_sfnt_off00005c24.bin
e57b42139a04d615a051a7e44b1d6809751efdcbf3aea2a5343720a1018a3623
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C24 14612 bytes