Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a638bbf08bcadb2…

MALICIOUS

PDF

46.7 KB Created: 2020-08-24 17:38:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 916251ce8f13829a03e71a0d896cc754 SHA-1: d5a292e7c8bfeeac31bf39b1ea09c13090d5b2d4 SHA-256: 0a638bbf08bcadb289fd66bfdff1a4c64f690b6abc87a5d329653c799cdac6cc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. The document body also contains this URL, suggesting an attempt to redirect users to malicious content. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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=ccapi+2.+80
    • http://files.anahatahealing.net/uploads/1/3/0/7/130739146/rixerezudaxoxo.pdf
    • http://mujesexu.courtneymillerpilates.com/uploads/1/3/2/3/132303382/puxomovebokarurexaki.pdf
    • http://files.anamericanquilt.com/uploads/1/3/0/7/130740517/rekewizipo_jorezata.pdf
    • http://files.australianwandarrah.com/uploads/1/3/2/3/132303269/saxisabojokupagomi.pdf
    • http://files.antstrategic.com/uploads/1/3/0/9/130969438/3113805.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/malacetic_aural_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/4394/6649/files/zevukumulugobira.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/zokufobunisuxowewev.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/bilale.pdf
    • https://cdn.shopify.com/s/files/1/0430/5436/6877/files/93755843381.pdf
    • https://cdn.shopify.com/s/files/1/0429/7588/7523/files/jezokeregeperat.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/jotubixifinil.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/46474908795.pdf
    • https://cdn.shopify.com/s/files/1/0436/5379/1909/files/gopexuvomevamugit.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/articulos_indefinidos.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_off00006f38.bin
2c81364234a96eb7379fda5b0d211cfcb141ebd0da2164d42752ba4cd1cd0430
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F38 5028 bytes
font_01_sfnt_off0000805e.bin
efe14201aa164b3f4b00570f365f39d180ee11b64496b2059fb2a6983c400a87
pdf-font-stream PDF embedded font (sfnt) at offset 0x805E 14692 bytes