Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba2b4b5e7a1a5a0…

MALICIOUS

PDF

32.1 KB Created: 2020-08-14 17:36:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f383a2f6f0980289118781ebdc1407f SHA-1: 8a48ffac91282991915c5e9916ba962cd01e1172 SHA-256: 5ba2b4b5e7a1a5a0ed442f4f65cdc8d824ddcd9896083aa4dd56c1674d291874
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 hosting other PDFs, a technique often used for SEO poisoning or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=brahmani+mata+bhajan'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the structure and embedded URLs suggest an attempt to redirect users to malicious content.

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=brahmani+mata+bhajan
    • http://nesaguwu.terrysitz.com/uploads/1/3/1/1/131163635/0d0fc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0885/1098/files/lokofisorigiloserikeguti.pdf
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/joponoralid.pdf
    • https://cdn.shopify.com/s/files/1/0438/9886/3771/files/pdf_split_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/9065/6924/files/31939791726.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/72538296325.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/xoduwixexos.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9813/files/26955532032.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/causes_and_impact_of_air_pollution_in_zambia.pdf
    • https://cdn.shopify.com/s/files/1/0437/4324/8545/files/kafevof.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/wosojebujanewijiromiviv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8402/files/83146611632.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/rajepiximegojipasaberevu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/ameloblastoma_types.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_off000041a1.bin
762e1e73eea35e12ecf5b1ebc19498f44a0816473777e8386e65d1eb57a80a7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x41A1 4980 bytes
font_01_sfnt_off0000526b.bin
64579e4e841a25c000f6653893acb820c2a2bd40f8fe4b9eea1bdcb75c99d37b
pdf-font-stream PDF embedded font (sfnt) at offset 0x526B 10068 bytes