Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a62a0fb3642e5c…

MALICIOUS

PDF

57.8 KB Created: 2020-08-31 01:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e79443d52957999d85657c50e1e25a18 SHA-1: 0d62100677737682100fdac352f5d42b6af6ead5 SHA-256: 14a62a0fb3642e5c5e61e6d363ec385f1ddc4984b68a14af546bb690f98d599c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one prominent link directing to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though partially corrupted, contains text related to 'toys for dogs' and the malicious URL, suggesting a lure to drive traffic to malicious infrastructure.

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/wix?keyword=toys+for+dogs+that+like+to+lick
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/269bb8_6fdf44e339494780859fed212dafbafd.pdf
    • https://static.usrfiles.com/ugd/b914b5_1a122142f3424459bf31074ec7040b04.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_ba596e74927046a886c329f7442ced25.pdf
    • https://static.usrfiles.com/ugd/0779a3_757ec943328d495dad31aa676efed3aa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4111/9653/files/gta_san_andreas_cheats_xbox_one_phon.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/dnd_3._5_wizard_spells.pdf
    • https://cdn.shopify.com/s/files/1/0434/3214/9148/files/91245903515.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2805/files/radexilujeked.pdf
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/52474904536.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/xhamster._com_channels_new-_group-_1._html.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce6250a253c848d9bf17ad1eedaefbd7.pdf
    • https://static.usrfiles.com/ugd/9757e7_e253193a27ba4751b2f131fb478c0f0f.pdf
    • https://static.usrfiles.com/ugd/221f3a_a66a9a61fda743c1aaf482e785a3c2ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_855f1828950c49308e396aa98137963a.pdf
    • https://static.usrfiles.com/ugd/5cf23b_eca8435e9da7400297a59574ef2aac96.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_off0000a370.bin
f55bf7dab1fe4b68846b6c74108c52a8aeaac075e0fc869e0658c035a34aa73b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA370 5396 bytes
font_01_sfnt_off0000b5cb.bin
17f01a30f6c77f9e719de0ba1f711d95730628ce5b3294d22447988c0fbf5bfb
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5CB 10664 bytes