Malicious PDF — malware analysis report

Static analysis result for SHA-256 264a0551314010e6…

MALICIOUS

PDF

41.7 KB Created: 2020-08-14 19:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca37d6027d00c40bb1bb5ae78366865d SHA-1: 21ce9ea66339b266b15cc37c5c43e9dac445fd50 SHA-256: 264a0551314010e69a1384dcd30b2a37dfd85b2d3e3a5568993c3f0e5e98a8f9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains, likely as part of an SEO link farm. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.cc/wb?keyword=hockey%20world%20cup%202018%20time%20table%20pdf%20download`. This suggests the document is designed to lure users into clicking malicious links, potentially leading to further compromise.

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.cc/wb?keyword=hockey%20world%20cup%202018%20time%20table%20pdf%20download
    • http://files.beasleydoodles.net/uploads/1/3/1/6/131606666/c2831.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/ajedrez_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0434/1730/5240/files/11682970281.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/adyashanti_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/15971112387.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0719/files/13508351989.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8592/files/77021284741.pdf
    • https://cdn.shopify.com/s/files/1/0434/7835/2022/files/citadel_miniatures_modelling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/28108686578.pdf
    • https://cdn.shopify.com/s/files/1/0434/0350/9914/files/99525462873.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/jexufafobekojetuworariw.pdf
    • https://cdn.shopify.com/s/files/1/0439/8628/8798/files/2003_jeep_grand_cherokee_owners_manual.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057cd.bin
001bf2124f5bf381adbc1d232763113687ea452385a67ab2b55bf594b83e2f86
pdf-font-stream PDF embedded font (sfnt) at offset 0x57CD 6004 bytes
font_01_sfnt_off00006c35.bin
73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C35 1936 bytes
font_02_sfnt_off00007578.bin
8c611b3d697f639faf6839ed87f09917b7556ceb13e9360e1fa4933696ee9ddd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7578 10684 bytes