Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e84bf8d08d1add…

MALICIOUS

PDF

44.7 KB Created: 2020-07-31 12:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a9e9507cb790c0dcca56ca1d87b6ad9 SHA-1: d7dc674d6b6719b757f597f6918fa6ea05e5e9e7 SHA-256: 01e84bf8d08d1adda1ba8573b7590d12e833316b693617a4af2453709f6bae99
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious sites. One of the primary links redirects through 'ttraff.cc', a known malicious redirector. 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/pify?keyword=ceftriaxone+sodium+davis+pdf
    • http://files.lion-fabrications.co.uk/uploads/1/3/0/7/130775032/829955.pdf
    • http://files.brockportjunioreagles.com/uploads/1/3/1/6/131606953/6972629.pdf
    • http://files.artflockstudio.com/uploads/1/3/1/4/131455832/7ad4613eaf.pdf
    • http://files.ernesthatton.com/uploads/1/3/0/9/130969577/seweredezapup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/gipidobadilosadaxavew.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/xedapefaro.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/19197386978.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/kawobalovijuj.pdf
    • https://cdn.shopify.com/s/files/1/0440/7971/0360/files/zojebatasiduriwopoxow.pdf
    • https://cdn.shopify.com/s/files/1/0436/0280/4898/files/94972093620.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/kifapegazunugukido.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/52306154791.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2103/files/73674704385.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9833/files/97903864299.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/76729946959.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4309/files/fabixepofu.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_off00007115.bin
ebb8983083881437173325698eaa8472b1f1225906fa3be38b660f638f604e4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7115 5188 bytes
font_01_sfnt_off000082aa.bin
5aee357f4480f3fc987a6f66a17f999bd98e3cd6dca45dd8bd6b37aac969d7ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x82AA 10140 bytes