Malicious PDF — malware analysis report

Static analysis result for SHA-256 608c8cf4817608db…

MALICIOUS

PDF

35.0 KB Created: 2020-08-30 04:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da264910abc714360ce38a0c20c4d2e3 SHA-1: 14d9ed39cc4b597419b164f0ea643122679cb165 SHA-256: 608c8cf4817608db9ecdf07df279865f436da87c76ea003c9fb61c0220341b1a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, disguised as academic material. This redirector likely leads to a phishing page or malware download. The document also hosts a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic to increase visibility. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

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.me/wix?keyword=international+financial+management+12th+edition+jeff+madura+solutions
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/097bd5_d0376edfda1041c6a699e64d0dae032e.pdf
    • https://static.usrfiles.com/ugd/c836c3_454f150b115046edaa3e571c724e88e2.pdf
    • https://static.usrfiles.com/ugd/4d6844_eb9e4d87485346ba901c1bd76dd7092d.pdf
    • https://static.usrfiles.com/ugd/8de238_8b7b997046a146d68a3e69f2ce91d5e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_1426225cefd9417493bf0331e6b88b03.pdf
    • https://cdn.shopify.com/s/files/1/0463/5023/7858/files/povepe.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/rafal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/70650905299.pdf
    • https://cdn.shopify.com/s/files/1/0434/7881/0789/files/90448249552.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/9761808220.pdf
    • https://cdn.shopify.com/s/files/1/0439/0669/5320/files/africa_political_map_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/goparorufojadororemen.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/form_1122_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0428/6123/2294/files/jufofozer.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_off0000496a.bin
91b0ca9232478a7591149bb57b7d281a04a6ee09512f4b01567adf2872687d01
pdf-font-stream PDF embedded font (sfnt) at offset 0x496A 5632 bytes
font_01_sfnt_off00005c6c.bin
aef1cf20d456bd94bd7ef2e1adcff0b42be262b857629e458f3c53d6191aa5e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6C 10136 bytes