Malicious PDF — malware analysis report

Static analysis result for SHA-256 101f1e11322c9e82…

MALICIOUS

PDF

40.8 KB Created: 2020-07-29 11:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eea6a769c2c0ce73e4cf79d997a60890 SHA-1: 3554fdabb91a5196377da218604af01ede6f3bb9 SHA-256: 101f1e11322c9e8274d7e5de9705869e960727e027035d9498cbdef1256a6227
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure (ttraff.cc). The document body, though heavily obfuscated, suggests a lure related to a '2020 year at a glance calendar pdf'. The presence of a link farm heuristic further indicates an attempt to distribute or redirect to multiple external resources, likely malicious. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=2020+year+at+a+glance+calendar+pdf
    • http://files.nestgiftsdecor.com/uploads/1/3/1/4/131406592/wigutevurevivitubam.pdf
    • http://files.jjsdka.org/uploads/1/3/0/9/130969819/98a098cf.pdf
    • http://files.utterlyuncluttered.com/uploads/1/3/1/4/131437660/rusabubemopudej.pdf
    • http://files.cagecommerical.com/uploads/1/3/1/6/131606546/eccdead.pdf
    • http://files.melwycked.com/uploads/1/3/2/6/132682829/7338453.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7541/9812/files/letalevodused.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/jatubewuwedowajenajimora.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/65568604542.pdf
    • https://cdn.shopify.com/s/files/1/0436/2623/4009/files/pewuzugutarodiwovemekak.pdf
    • https://cdn.shopify.com/s/files/1/0433/3410/7286/files/39541814697.pdf
    • https://cdn.shopify.com/s/files/1/0437/5209/5898/files/xewafiwizomus.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/magetikovuboj.pdf
    • https://cdn.shopify.com/s/files/1/0436/0011/7928/files/dedaxek.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/xukadadilaxuniz.pdf
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/nomovoguxowajoxit.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/bedatagetozumifigerez.pdf
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/tadilomifasasudaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8819/1396/files/pilozufoxutopinelejikisot.pdf
    • https://cdn.shopify.com/s/files/1/0439/0679/3627/files/86618918299.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_off000062df.bin
c3eee82bd37407b697afb7f962c6ee4ccbb2ff95ab27f876094913d804c58079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62DF 5056 bytes
font_01_sfnt_off00007419.bin
b8e1deb94558458b582f937dfea5abe99212d08996352e0ceebd5d5935a2a19f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7419 9932 bytes

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