Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2ead26ba1554a1…

MALICIOUS

PDF

57.1 KB Created: 2020-08-07 07:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1f7469c8bbf07bd9ce2d0934f6d21d8 SHA-1: c67e24fdf546016cabac4a3f366fd4f84fddae9d SHA-256: 0c2ead26ba1554a1df08ffdc16ca413b128862d35759c0819723fbb4a4ee4d2e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to lure victims to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=phases+of+ontogenetic+development+pdf
    • http://files.eglingtoncemetery.com/uploads/1/3/2/6/132682647/fipebizo.pdf
    • http://files.shopclassycactus.com/uploads/1/3/1/1/131163920/967a3f95b13d4.pdf
    • http://jirel.dreamstatecircus.com/uploads/1/3/2/6/132681670/repagopejiraxura.pdf
    • http://files.ravencreativeco.com/uploads/1/3/1/4/131438499/ba4991e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/65942107141.pdf
    • https://cdn.shopify.com/s/files/1/0440/7469/6856/files/67644864539.pdf
    • https://cdn.shopify.com/s/files/1/0430/4663/3621/files/zexodut.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/27173869249.pdf
    • https://cdn.shopify.com/s/files/1/0429/1212/0998/files/bubaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/33467785837.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/business_communication_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/75921183252.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/portable_garages_harbor_freight.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/28280391955.pdf
    • https://cdn.shopify.com/s/files/1/0432/3727/7855/files/18173799165.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_off00009aa7.bin
44f8dd9ed1fc1b792c49a2050c346465b7309f09815066894f77cb8b383f29f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA7 5532 bytes
font_01_sfnt_off0000ad66.bin
f721d4d6851924032f1818c9a49bcdec276b55192f4f6dc4fdecf3786d0f464e
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD66 13436 bytes