Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f417acd7eab6ba…

MALICIOUS

PDF

49.6 KB Created: 2020-09-04 08:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1861909475e0c8073554916e24eaac31 SHA-1: 6247f497be4087af37a8b59115bdf4e928dfcd65 SHA-256: 79f417acd7eab6ba3e79623a22229af0ac386233694559002fa691794d0a817e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The primary malicious link likely leads to a phishing or malware download site.

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.me/wix?keyword=mexican+invitations+free+templates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4627/2162/files/banipisitoligilisar.pdf
    • https://cdn.shopify.com/s/files/1/0438/1153/7053/files/50631210145.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2106/files/goxira.pdf
    • https://cdn.shopify.com/s/files/1/0429/1503/7343/files/59622028645.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/rawokafavukozutubere.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2235/9447/files/flying_home_2014.pdf
    • https://cdn.shopify.com/s/files/1/0428/2158/3004/files/nawizuwixawutere.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/31259379498.pdf
    • https://cdn.shopify.com/s/files/1/0429/6550/0060/files/tratamento_da_anemia_hemolitica.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mavadusuwavofemikedoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/96920538861.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/8571872940.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/twitter_delete_likes.pdf
    • https://cdn.shopify.com/s/files/1/0432/4422/4679/files/chrome_extensions_crx_file.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_off000084b4.bin
6debf468063fad0b0e8158bb2851d22ae62ca96992f243eaec26353669069caf
pdf-font-stream PDF embedded font (sfnt) at offset 0x84B4 5296 bytes
font_01_sfnt_off000096ba.bin
ed7fe39cef2d8553f4dda022473c15fd4e9b97af36ffd80ab2cd166b061de85d
pdf-font-stream PDF embedded font (sfnt) at offset 0x96BA 10244 bytes