Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa8af335a6f6e44…

MALICIOUS

PDF

41.6 KB Created: 2020-08-19 05:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ca5a179f6850d51a66c67ff35e0d0fd SHA-1: aa8f582179d9e42bcd44b95c0919236b4e3368d9 SHA-256: faa8af335a6f6e449cbdd1d8c88786768a42d936b3b737a303e0fd2559f8e3ed
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'report lost flybuys card' notification, which is a common social engineering lure. The document body and heuristics confirm the presence of this malicious link, which points to ttraff.com. The PDF also hosts a large number of external links, many pointing to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic to distribute malicious content.

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=report+lost+flybuys+card
    • http://files.sclhcc.com/uploads/1/3/1/4/131484029/wudininane.pdf
    • http://files.schec.net/uploads/1/3/0/8/130813042/743207.pdf
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/xetapima.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/goperofuxexokalexor.pdf
    • https://cdn.shopify.com/s/files/1/0446/6376/7203/files/lodolinutixafajo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/8064834195.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/marawaguti.pdf
    • https://cdn.shopify.com/s/files/1/0435/1308/6106/files/bm_sakharkar_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/18484563753.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/52258950351.pdf
    • https://cdn.shopify.com/s/files/1/0430/7786/1527/files/88484605487.pdf
    • https://cdn.shopify.com/s/files/1/0435/4942/5823/files/antibiotics_types_and_mode_of_action.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/xufepenegubosejilaxosixeg.pdf
    • https://cdn.shopify.com/s/files/1/0440/8829/5576/files/potifaw.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_off0000637f.bin
30964d090319715da741ef6c9012ec90e52e89df0e4f1781874ce9907002418a
pdf-font-stream PDF embedded font (sfnt) at offset 0x637F 5400 bytes
font_01_sfnt_off000075f3.bin
0ce86ad2516fbceda86064ae54b6a769ab0fbf6840d3ef5e562756cf9fad4d02
pdf-font-stream PDF embedded font (sfnt) at offset 0x75F3 10356 bytes