Malicious PDF — malware analysis report

Static analysis result for SHA-256 178dd74aa1392700…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 07:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 007436e8cdff7d80d7eb5b5c67d357fa SHA-1: 4740d51f4eb089f098735e40992c9f6f57be2eb9 SHA-256: 178dd74aa139270050dbd565b66ef7e5be0d0fb367641994db2da028c937ad96
154 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, including one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to software keygens and the malicious URL, suggesting a lure for users seeking cracked software. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm designed to distribute malicious content.

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/wix?keyword=acid+pro+8+keygen+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/32966871003.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.pdf
    • https://cdn.shopify.com/s/files/1/0433/6025/6159/files/headway_beginner_student.pdf
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/89159814129.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/11192972773.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/xazepofexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0413/2508/files/picsart_online_photo_editor_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/40102876941.pdf
    • https://cdn.shopify.com/s/files/1/0429/7962/3071/files/11940048727.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/its_my_life_no_doubt_lyrics.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_off00006245.bin
d654f23093064a45031d450265c983d4b3250db7611052df9cb413bf3e8ee10f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6245 5588 bytes
font_01_sfnt_off0000757a.bin
de16aa5c70a57207a9eef53779d319207744746c4d4dd029f12434082b6e3eb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x757A 10396 bytes