Malicious PDF — malware analysis report

Static analysis result for SHA-256 13bfa00e2eea127f…

MALICIOUS

PDF

48.7 KB Created: 2020-08-22 03:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30a36c6cb3b2749cb231e5c3f5038f3b SHA-1: 447e330defa207107ce05fb799cbea1fc0547926 SHA-256: 13bfa00e2eea127fd1b95ec1383bd99521dd58e56a58271346ca913c94f26171
154 Risk Score

Malware Insights

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

The PDF contains numerous links, masquerading as a CV template, that redirect to malicious infrastructure. The primary malicious link, 'https://ttraff.cc/pify?keyword=free+cv+template+word+format', is identified as a redirector to known malicious sites. 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=free+cv+template+word+format
    • http://files.templetonffa.org/uploads/1/3/0/7/130776073/4460813.pdf
    • http://files.baileyjackartstudio.com/uploads/1/3/1/3/131398143/genuzedogiz.pdf
    • http://rigasi.dickensyardealing.co.uk/uploads/1/3/1/6/131637352/cc4ff4.pdf
    • http://pogateno.villaparguerahotel.com/uploads/1/3/0/9/130969061/japopekowa.pdf
    • http://jivavukij.orchardheightsonthefox.com/uploads/1/3/1/3/131380005/1d820.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/8769/7822/files/rewutonimikipa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/zagurixaxagokawanodasuwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/vutidedaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/gonasowowedaberixo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/mogurolatifewivis.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/88294138090.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/wirutofevar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8715/0752/files/37281268960.pdf
    • https://cdn.shopify.com/s/files/1/0441/3823/4008/files/90790830021.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/punctuation_worksheet_for_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/49090290571.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_off00007f6e.bin
8984e58f90c7c9c4a92516c46e8ec0eca6f011139edeaa6bf72dcc46e68cb401
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6E 5232 bytes
font_01_sfnt_off00009137.bin
0fa5770c98a80c3a97bc7f834c3cef1589615fdacad6f43ea01ebec158d99cf7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9137 10732 bytes