Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eaf2ed6631b77fd…

MALICIOUS

PDF

44.9 KB Created: 2020-09-07 20:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7b8cb6605c16290fc191fd8a8bad2f4 SHA-1: 7233821aeaf3ec2c497513f64f1fc721c2460217 SHA-256: 6eaf2ed6631b77fdbcefb166b5f5235ed99bad89dd9a5d86bb01c03384cfdded
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.link'. It also exhibits a PDF link farm pattern, with numerous links to external PDFs hosted on Shopify. The document body contains the same malicious URL and a benign-looking PDF filename, suggesting a lure to trick users into clicking through to malicious content. 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.link/pify?keyword=aura+lighting+control
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6939/0500/files/ntr_biopic_songs_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9489/9864/files/40052311625.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/how_to_cite_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/vixujidijakiriv.pdf
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/likisufozilirawa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7352/6178/files/45063569167.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/74231574291.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/i_90_traffic_report_rochester_ny.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9861/files/animal_names_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0432/9652/2398/files/bama_x4_tuner_manual.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_ddc0964de3ca4b88bc21fe70af397da8.pdf
    • https://static.usrfiles.com/ugd/a2d007_23873d756b934bc2893f3dbd2a180c7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_274da813579f432e9db73af3b685073c.pdf
    • https://static.usrfiles.com/ugd/89064d_2c9c5d38d8984b66964a8e7c0dd03f91.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_e7a3356b8bee4135958602353a1a81c9.pdf
    • https://static.usrfiles.com/ugd/dc98cc_7fee505b8e284704bef7a4798edc194d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ebe5f5248af946c5b1cf4e1835eef8ce.pdf
    • https://static.usrfiles.com/ugd/67f5f7_1d8ef6762fd844dbb56d7fc8e6419a01.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_off00006a32.bin
521bdb7f8febba5b40da9f8ab2ab018ff899a7a82636eb1ef2f121c39bfe39cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A32 4872 bytes
font_01_sfnt_off00007ab5.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB5 1800 bytes
font_02_sfnt_off00008343.bin
c5057d3a4432c5a559a0b8db1db459174a1c7d245d86360e3fe114f64b386d8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8343 10172 bytes

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