Malicious PDF — malware analysis report

Static analysis result for SHA-256 15fb69599c4275b8…

MALICIOUS

PDF

40.1 KB Created: 2020-08-23 20:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cb7316d06e0e477030a7864e33505bd SHA-1: fb60590e2e54902ad0c699ce9c47e40b836152ec SHA-256: 15fb69599c4275b80f27944651615ba841b73f655207925fc224026f9a76144c
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'color printer utility'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the primary maliciousness appears to stem from the redirection to the ttraff.ru domain.

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.ru/pify?keyword=adobe+color+printer+utility+mac
    • http://files.walkthruyoga.com/uploads/1/3/1/6/131637037/c44f62.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/causative_active_and_passive.pdf
    • https://cdn.shopify.com/s/files/1/0434/3054/3512/files/dexijumajutavijaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/subject_verb_agreement_quiz_with_answer.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/rafezubu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4637/files/756677024.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/dogagogekugubetopisebazu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4817/2710/files/frozen_fever_full_movie_720p.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/sample_readme_github.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/pimimozalemufu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/midas_m32_manual_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/33490455499.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/647973840.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_off0000602f.bin
ec0a894ddf388d1c0e2d01d8f2e54d1a5bf07eaa13697fe170f61f535efae2f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x602F 5272 bytes
font_01_sfnt_off00007201.bin
c2fc9640bd97c810e996985bbb51888bb432d73c6bb0c5687f1ebc5a0c4b215d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7201 9872 bytes