Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9a19ec0fa31560…

MALICIOUS

PDF

36.3 KB Created: 2020-09-12 23:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3a8f2127a695a810baa5d0ae83ae3df SHA-1: dbe043452e0f021852ae153483f94d24c8084667 SHA-256: da9a19ec0fa3156081335db4776a9ca39dd1ea509c82751814b8871ff2377add
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a phishing or social engineering attack where the goal is to redirect the user to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, so the primary attack vector appears to be the malicious link within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=mitermate+saw+guide
    • https://cdn.shopify.com/s/files/1/0462/7156/1890/files/brilliant_connect_app.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8908/files/banepomiwixuxodesudozim.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/84252064324.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53293114795.pdf
    • https://cdn.shopify.com/s/files/1/0437/1261/0472/files/72309308974.pdf
    • https://static.usrfiles.com/ugd/d162e3_e2ecdb89c1654d86bea0551a80aca07f.pdf
    • https://static.usrfiles.com/ugd/fd3290_03c92817ad5b4dfdbda72a976778aa77.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3041/files/wekixopugabuvejelosiki.pdf
    • https://cdn.shopify.com/s/files/1/0433/9833/2572/files/ielts_speaking_part_1_topics_2019.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/reading_skills_practice_test_14_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/5394/0887/files/free_sheet_music_for_piano_worship_songs.pdf
    • https://static.usrfiles.com/ugd/76156b_5a09f3a9b60d4d98941f556e6361b9bb.pdf
    • https://static.usrfiles.com/ugd/f96b02_f65c49e010bc4ff49639dd55e8e48efd.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050ac.bin
ae7ee1328dd0e3d9fdbfa5656909c4c5175e405e9400e648298709803f75d220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50AC 5208 bytes
font_01_sfnt_off00006263.bin
643d46fe2e20773f749d75e205c8e57e5ec963b63c917a4d6e814ed785519187		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6263 10144 bytes

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