Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d0547f43fe3cfe…

MALICIOUS

PDF

48.2 KB Created: 2020-08-03 07:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54b43a6883681ea9382b96237cf7787d SHA-1: e83703d29852e9d95170effbdbfe634f5c54cbd2 SHA-256: 17d0547f43fe3cfec526093371f01499524099ae24f14407b3658e6781a87d0a
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-hosted PDFs, which is indicative of SEO poisoning or a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous links suggests a social engineering attempt to direct 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=warframe+beam+weapons
    • http://files.treeoflifeph.com/uploads/1/3/2/6/132695994/mexefuganemebam_toxuzinazeri.pdf
    • http://befixusid.llenise.com/uploads/1/3/0/7/130775422/zefujazuvimopasugujo.pdf
    • http://files.irismeade.com/uploads/1/3/1/3/131384380/vajuvemuf-busalasesadato-bulatajofu-mazixufonix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/86365725876.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2996/files/bash_add_to_path.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nelafujadodejofit.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/9395085953.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45035229099.pdf
    • https://cdn.shopify.com/s/files/1/0431/3917/0466/files/47953849124.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/bowuvuwazusaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/89262755351.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/jaxuwasatireki.pdf
    • https://cdn.shopify.com/s/files/1/0440/1859/8038/files/65082041810.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/54789215029.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/96962448359.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007091.bin
6b92d7db41a352e7c5458a36161f6d8a0b87aedde33f3c31995fd0b58da7cc08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7091 4920 bytes
font_01_sfnt_off0000812f.bin
810ea24cd3a9049f1e3f462c8767f3cd7d7851d899e805d714fd215ff91416ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812F 10612 bytes
font_02_sfnt_off0000a570.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA570 4324 bytes

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