Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f17fe0f4a4d9c1…

MALICIOUS

PDF

41.0 KB Created: 2020-08-10 02:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9b386df667cfc9530a208f6e3a12cec SHA-1: dc2bb8e3d1b67d2d1fc3d204a00dcedc4e45fff4 SHA-256: 08f17fe0f4a4d9c171781d4ed0834f9983b1f004b9bc54d222e6e8b191badb2e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at "https://ttraff.com/pify?keyword=cataracts+surgery+pdf". This suggests the document is part of a link farm or SEO manipulation scheme designed to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=cataracts+surgery+pdf
    • http://files.be-remarkable.com.au/uploads/1/3/0/7/130738554/ba70baf96.pdf
    • http://povuwite.drdavidhartman.com/uploads/1/3/2/6/132695615/rimoren.pdf
    • http://files.rasigsassociationnsw.org/uploads/1/3/1/4/131407406/dipudusunu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/45607765220.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/tuwoburesemarimaxukitaxox.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/visazofemezoseti.pdf
    • https://cdn.shopify.com/s/files/1/0448/2488/7456/files/la_caida_de_tenochtitlan.pdf
    • https://cdn.shopify.com/s/files/1/0428/5906/9599/files/xozonubuvutizege.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/java_square_root.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/nusegokosexoboleluwibej.pdf
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/13863163833.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/95317448441.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5380/files/31392774495.pdf
    • https://cdn.shopify.com/s/files/1/0438/1969/6290/files/difference_between_automobile_and_automotive.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_off00006266.bin
a5a5e89ab9fbaff3eb3abdbb7a9c2db4c75ab8b074e5e8d2c175e04fd62e6215
pdf-font-stream PDF embedded font (sfnt) at offset 0x6266 5300 bytes
font_01_sfnt_off0000747f.bin
da31fc1e0207417126942f580d4899bbf35e153773fd24855fec2d79b1fbc014
pdf-font-stream PDF embedded font (sfnt) at offset 0x747F 10336 bytes