Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f001d065df2a929…

MALICIOUS

PDF

51.3 KB Created: 2020-08-17 13:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1302dbb1c6e85a0c27a4cc458dde0cb SHA-1: b1f7065c57f92940b588c072adb8f270fdfd4375 SHA-256: 0f001d065df2a929312e08a2835c89048d7fe4e3802aabd6636b14d10069208d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly indicated maliciousness. The primary malicious URL is ttraff.com, which is likely used to redirect users to further malicious sites.

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=audacity+software++cnet
    • http://files.obviouspr.com/uploads/1/3/1/3/131380600/1161398.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5528/4378/files/35777072686.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/40501204334.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3062/files/critical_thinking_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0428/4229/2390/files/19474393197.pdf
    • https://cdn.shopify.com/s/files/1/0428/2220/5607/files/okuma_osp_programming_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/dopin.pdf
    • https://cdn.shopify.com/s/files/1/0437/4947/4453/files/javonizo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7480/5148/files/25923981801.pdf
    • https://cdn.shopify.com/s/files/1/0435/5892/8545/files/range_and_endurance_of_an_aircraft.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/23674651456.pdf
    • https://cdn.shopify.com/s/files/1/0435/0964/5478/files/91070345371.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/49438515164.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/zakafedaboguvabavizede.pdf
    • https://cdn.shopify.com/s/files/1/0452/5637/6480/files/opposite_words_in_english_a_to_z.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_off00008be6.bin
e379a485f8b6417b1e50b224fab669e9d11b3ce61e0be4be10c236bab3df4673
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE6 5168 bytes
font_01_sfnt_off00009d9a.bin
d5a5a045b04d26b38279c613fef6651fc786d1951834da9a167c6b599fecd005
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9A 10224 bytes