Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f9818b97b011cf…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 05:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee63f6b43883c542186eff79a6c0355c SHA-1: 14abf22386ce61145068922ea890a31d3c739c72 SHA-256: d0f9818b97b011cf118e0f923011cf367e6fc487fdd496ed29c606c31638f8ae
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and a reference to 'Division 2 armor regeneration', suggesting a lure. The PDF also hosts a large number of external links, many pointing to Shopify domains, which is characteristic of SEO link farm abuse.

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=division+2+armor+regeneration
    • https://cdn.shopify.com/s/files/1/0440/1391/2222/files/anemia_drepanocitica_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/kivazova.pdf
    • https://cdn.shopify.com/s/files/1/0431/2688/2471/files/juwubuxitejuzeduxufedu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0071/7724/files/vefodejividetuligo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/gipewoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/93863614919.pdf
    • https://static.usrfiles.com/ugd/0adedf_6a801cda339d4635b619226c401b3725.pdf
    • https://static.usrfiles.com/ugd/c63dba_2cf0af81e1ec4f93bdeba5429364e24b.pdf
    • https://static.usrfiles.com/ugd/ac72e0_f15497a9c2cd4e3198f85d326ae0964c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a694811ad564bd38b965194c57d12a1.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/xojegadason.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/16075948860.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/35082819629.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.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_off000060e0.bin
d3161b9db9a25936f42f160f693152407ff438c6378664a2accbcd2dfcb84256
pdf-font-stream PDF embedded font (sfnt) at offset 0x60E0 5164 bytes
font_01_sfnt_off00007263.bin
7bea360e0348f30e832e5d4df842b3b5bac5318ad71738426e08eba89f0da11f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7263 10244 bytes