Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eac64e73d7d1b66…

MALICIOUS

PDF

40.8 KB Created: 2020-08-16 13:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0aedba6d099676d87e5e81d111c784c SHA-1: 222019f6b9ea88c2cd2f0fcec2e80919ba459548 SHA-256: 3eac64e73d7d1b6667c7f12e7db9376f5efad75d79813edf68d94773b4bd3a87
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and references to 'easy chicken fajitas baking sheet', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to obscure the malicious redirector.

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=easy+chicken+fajitas+baking+sheet
    • http://files.tpels.com/uploads/1/3/0/8/130874588/kofaxetelamasu.pdf
    • http://bujujujes.truehopehealthyliving.com/uploads/1/3/1/4/131438539/sunijabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8270/3257/files/business_balance_sheet_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/51435107638.pdf
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/rozobuxenozavoguvesomano.pdf
    • https://cdn.shopify.com/s/files/1/0432/8095/7598/files/metikerorufagavikenev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/88471367060.pdf
    • https://cdn.shopify.com/s/files/1/0438/2805/2130/files/adhesive_bonding_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0436/2256/4000/files/95085430973.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4533/files/duzexigidikarunup.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/65019481236.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_off000061df.bin
559442b413f9d355a960b572fb076467215b45c5e980064c15a68236888ccb69
pdf-font-stream PDF embedded font (sfnt) at offset 0x61DF 5356 bytes
font_01_sfnt_off00007422.bin
0b34070cdbe492bf84b8ab6cae15fc96cbecae33c387f075453e2a5e118f1b3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7422 10060 bytes