Malicious PDF — malware analysis report

Static analysis result for SHA-256 71d8a5f06d9977f7…

MALICIOUS

PDF

36.0 KB Created: 2020-08-02 15:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3af7a570864f6e70d2fc6f4698a1fadd SHA-1: 3441bc405cd2d29f12ebae85257a4c4ad55e3b51 SHA-256: 71d8a5f06d9977f7c00857123f3a955a1705291bd0889141c8ea64c683e12063
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, containing numerous external links to other PDFs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded links and the PDF structure suggest an attempt to redirect users to malicious content or engage in SEO poisoning.

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=dd+national+live
    • http://files.summasportswear.com/uploads/1/3/1/4/131453807/118d8e22a22790b.pdf
    • http://files.integritymgmt.net/uploads/1/3/0/8/130873728/junokiwab_kebufetapi_foxisajenukigi.pdf
    • http://files.beauteaspace.com/uploads/1/3/2/8/132814071/9421232.pdf
    • http://files.drgurski.com/uploads/1/3/1/1/131164321/fewowolotiperavedux.pdf
    • http://files.jessicafineartist.com/uploads/1/3/1/3/131384335/linoz.pdf
    • http://www.zengatv.com/embed
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8547/0627/files/43454557745.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/cummins_onan_generator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7776/files/14417785620.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/fuxasuwizux.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/83277464452.pdf
    • https://cdn.shopify.com/s/files/1/0435/6780/8667/files/vasipoxapame.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/90903894886.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/reset_git_repo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/after_effects_wiggle.pdf
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/pemulalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0094/6073/files/biliwidozobu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4373/3154/files/acurite_5_in_1_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/mutamejinigasoramufinileb.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/fufuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.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_off00004ff5.bin
55dc282f6da0238abf8b81464b48b693d470d321d59e0526a6f6ace567698ffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FF5 4604 bytes
font_01_sfnt_off00005fbc.bin
b6fb6c643d4590714e83ffd2f6eff10559141b11acd218fd29eddb3654835dcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBC 10180 bytes

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