Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ee6f84cb159685…

MALICIOUS

PDF

61.7 KB Created: 2020-08-12 12:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 515faf3421282b93f9215d4e464d54d1 SHA-1: 3a8bcfe6aa972e5efc9203fb20c5316252e5a36f SHA-256: 03ee6f84cb159685560fa820b13f64b62cb3910407a1272cdfc733f27bb0bcb7
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious content. The document also includes a large number of embedded links to PDF files hosted on various domains, suggesting a link farm or a method to distribute further malicious content. The ML classifier 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=attestation+de+travail+cnr+pdf
    • http://files.evandusenportfolio.com/uploads/1/3/1/4/131454355/bf82dedefb0f4.pdf
    • http://jelipo.thescisquad.com/uploads/1/3/0/7/130776791/borage-solujurevemew-xefawuvil-fusaw.pdf
    • http://files.rebeccakotz.com/uploads/1/3/1/3/131380600/393eba1fa2869.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7180/7394/files/vatofuzejudogixunofijiru.pdf
    • https://cdn.shopify.com/s/files/1/0431/9205/8005/files/73582837555.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/35473557172.pdf
    • https://cdn.shopify.com/s/files/1/0431/2147/5738/files/54294053949.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/losutuvezepikev.pdf
    • https://cdn.shopify.com/s/files/1/0439/2180/1371/files/monica_i_know.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/bulozuxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/the_economist_28_september_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/nigofugemikabexiroz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/16472557353.pdf
    • https://cdn.shopify.com/s/files/1/0438/1687/8242/files/zejobibometipasetaxujom.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9777/files/zivuxovule.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_off0000ada8.bin
067ea5129ebf2172f7767626ba5fd956ba831858fa8344996fea6a4b72de1ed3
pdf-font-stream PDF embedded font (sfnt) at offset 0xADA8 5196 bytes
font_01_sfnt_off0000bf64.bin
19012dd9aca3a999dec5040e24ff5919e6b288f4fefd169083e2988febb7e15c
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF64 13008 bytes