Malicious PDF — malware analysis report

Static analysis result for SHA-256 80985423ece1a1da…

MALICIOUS

PDF

36.6 KB Created: 2020-08-29 06:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 164721729c453037fa5051f0da482910 SHA-1: 25908b9f94ec1d2b9c57dc574d862ea9ed2210a9 SHA-256: 80985423ece1a1da85c7f6e905d2e0f0ef66cb1f44d6a9ed6da1ca40a3c5a8eb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to malicious sites or download further payloads. The heuristic PDF_SEO_LINK_FARM indicates the presence of numerous links, suggesting a link farm designed to attract traffic, with the primary malicious link being the most concerning. 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.cc/wix?keyword=metaphysical+anatomy+volume+1+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/9212/3556/files/pride_and_holmes_sociolinguistics.pdf
    • https://cdn.shopify.com/s/files/1/0438/2018/7805/files/97004871629.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/xixokexulitekakifu.pdf
    • https://cdn.shopify.com/s/files/1/0449/0733/1739/files/soal_cfit_skala_3_bentuk_b.pdf
    • https://cdn.shopify.com/s/files/1/0429/5606/2876/files/kogobogikejelisumowula.pdf
    • https://static.usrfiles.com/ugd/b8c837_92f61fd7709348829d26cdb77bbda20c.pdf
    • https://static.usrfiles.com/ugd/b8c837_efd35249ba134561b3e8a6ddc2c84531.pdf
    • https://static.usrfiles.com/ugd/b8c837_48127191b83d43da81e17ede95c023b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_7edd44ac085d4c6fa20bd1fb0a4a616f.pdf
    • https://static.usrfiles.com/ugd/b8c837_343b882326ca46e9b1179078fae8ff77.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae7da68bce8846499a4a1e36268d7291.pdf
    • https://static.usrfiles.com/ugd/b8c837_f55a59ce7f6941d6a14aba786602ba0e.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_off000044eb.bin
ce3b86f8beca322880d0585701660b0682aeef70b8ef3030353b075366f3a3cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x44EB 5400 bytes
font_01_sfnt_off0000572d.bin
624cff5213225d83a6d0091877e93e523c3d1b4fbee8979a145e709269f746f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x572D 9528 bytes
font_02_sfnt_off000077c1.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x77C1 4324 bytes