Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e06058a0b64b09c…

MALICIOUS

PDF

38.6 KB Created: 2020-08-23 01:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d5c2537ccf5edb40796323ad03058c5 SHA-1: eeede5ab24e3d4d53331f3a5368b2a1125449793 SHA-256: 0e06058a0b64b09c6f2ed1bbeb6e42449534af370aca2bf3e1416f13bc0e37ff
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=rules+for+forming+plural+nouns+worksheet
    • http://werumuz.marionpalermadimaggio.com/uploads/1/3/1/3/131379179/duginulotewosur.pdf
    • http://files.replica-eames.co.uk/uploads/1/3/0/7/130739122/jafawudaga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/tuxuxonibebov.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/94522634249.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/vogik.pdf
    • https://cdn.shopify.com/s/files/1/0432/8534/8508/files/6804045206.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/tebukanijezen.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/18111254683.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/79149059027.pdf
    • https://cdn.shopify.com/s/files/1/0430/9132/9173/files/metodos_anticonceptivos_2020_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0434/2530/0629/files/73614563552.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/sawodapupuzineliweza.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/faxodubixinon.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_off00005810.bin
73e7f31660678c622ee4708e8b1df6f438bb134d5b6f71028ec3fe31721a2095
pdf-font-stream PDF embedded font (sfnt) at offset 0x5810 5476 bytes
font_01_sfnt_off00006aa1.bin
8917dfdcf4a543ec1a9444f10941b1dc7251790c1e714cc9ca7b7b2e685ba2de
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA1 10192 bytes