Malicious PDF — malware analysis report

Static analysis result for SHA-256 766901e083060276…

MALICIOUS

PDF

36.2 KB Created: 2020-08-31 03:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcf5c2393e2ac35aee42acf5b89b8979 SHA-1: a949461304e4dbfd92861ad80d49ec50f56d4b25 SHA-256: 766901e083060276648b0ca8e6d7ea98c749208e108c989a3de83e05e873bfda
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, characteristic of a link farm. One prominent URL, https://ttraff.com/wix?keyword=me+and+my+big+mouth+by+joyce+meyers, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links to PDF files, suggesting an attempt to drive traffic to malicious or SEO-spamming 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=me+and+my+big+mouth+by+joyce+meyers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/bike_racing_3d_hack_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3873/files/babalarinetimotewubabugur.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/lugatesigexubijilodoji.pdf
    • https://cdn.shopify.com/s/files/1/0432/9583/4280/files/pupipugakowufajirezifiguj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/active_and_passive_voice_notes.pdf
    • https://static.usrfiles.com/ugd/b8c837_a86d91661e1c4b0799e907e1ff31fb36.pdf
    • https://static.usrfiles.com/ugd/6cfc61_cfe6e7b469334269b20fce7c69f7f5a8.pdf
    • https://static.usrfiles.com/ugd/80c1db_0b99ed1be45a4b82a03d1872c8c7cbbd.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f299848bf874082b870d2a04cb945b0.pdf
    • https://static.usrfiles.com/ugd/822ecd_7c9734a400724d9b9e32d6c9b67d3e33.pdf
    • https://static.usrfiles.com/ugd/0779a3_95b19aa7b61045a29094925a6b0b3052.pdf
    • https://static.usrfiles.com/ugd/b8c837_50f6211c317440199d0a1933d8024b7f.pdf
    • https://cdn.shopify.com/s/files/1/0433/6916/9054/files/saxage.pdf
    • https://cdn.shopify.com/s/files/1/0440/4215/8245/files/81893720677.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_off00004f1a.bin
470953df19a266a63df4bba3a64aabe4afca19b22501bce9a4700a0bb358fdfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F1A 5644 bytes
font_01_sfnt_off0000622d.bin
7354f223af2b6e28939746dabed00967957da7d76134144651ff3cd6c2b807d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x622D 9968 bytes