Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad6ac1398732385…

MALICIOUS

PDF

41.4 KB Created: 2020-08-01 11:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bebcd8d1696bb37970b6469bdd0a067e SHA-1: 70f001ae89d337a1dfc3e68ae24689e942995d51 SHA-256: 5ad6ac1398732385687103bdfbd0810e6d12dfa160ecc8d7e34d77d48e4a5f6b
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 of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One of the primary links, 'https://ttraff.ru/pify?keyword=python+transpose+list', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure indicate 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.ru/pify?keyword=python+transpose+list
    • http://files.decibel-doo.com/uploads/1/3/0/8/130814382/sonibawuregutu.pdf
    • http://files.wilderways.scot/uploads/1/3/1/3/131380707/324b529a53.pdf
    • http://files.whatthesaintsknew.org/uploads/1/3/2/6/132682640/robij-dewopi-xuxas.pdf
    • http://files.kidsdollarstuff.com/uploads/1/3/1/3/131380953/2055250.pdf
    • http://files.lotusloveonline.com/uploads/1/3/0/8/130874369/2178496.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2775/9257/files/talasif.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/71080302694.pdf
    • https://cdn.shopify.com/s/files/1/0439/7151/0430/files/7342063066.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/35841790026.pdf
    • https://cdn.shopify.com/s/files/1/0437/6805/3909/files/kikoditagojexovata.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/bowozodikimo.pdf
    • https://cdn.shopify.com/s/files/1/0439/9949/4302/files/senuzedadonol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakisone.pdf
    • https://cdn.shopify.com/s/files/1/0440/6696/3621/files/vegilubafisujivexefeforen.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/52494059245.pdf
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/noladinegajixaxotuxumo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/3860199989.pdf
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/sobipebalililumupo.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_off0000628b.bin
ab226de1f2c3cec9498462338f06a0e98ba0cc1c060da8f6a2f353dcf97a6d7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628B 5008 bytes
font_01_sfnt_off00007397.bin
25efe7471f7a5de4d8ecf2f8e754892964e1df43b831bfaa7ee1768eea5ba57d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7397 10756 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.