Malicious PDF — malware analysis report

Static analysis result for SHA-256 53cd2b3f459a6ed6…

MALICIOUS

PDF

64.2 KB Created: 2020-08-21 08:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf4d41809b3237085e4ccd9406428994 SHA-1: e9ef6c1f1f459bdce88e83a371b18e69c00dd88d SHA-256: 53cd2b3f459a6ed6c4efad3ed6d6e5df6761acbac2f76839976b3a6df56fb7ae
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary purpose is to redirect the user to malicious infrastructure.

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=criminal+minds+season+13+episodes+guide
    • http://files.grandbendsoccer.ca/uploads/1/3/1/8/131871894/mirelukexuger.pdf
    • http://sigabud.midnight-farm.org/uploads/1/3/1/4/131453213/55b3f56.pdf
    • http://supimap.inspireddesignsandmarketing.com/uploads/1/3/1/3/131381497/366115.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5965/files/zefegagitatafanaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/3292/0739/files/61202431000.pdf
    • https://cdn.shopify.com/s/files/1/0430/0157/7625/files/46050916804.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/rozuwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2222/0439/files/zijegu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1556/8546/files/kogolilumuxejosimag.pdf
    • https://cdn.shopify.com/s/files/1/0428/8803/6515/files/ender_3_retraction_settings.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/estrategias_de_comunicacion.pdf
    • https://cdn.shopify.com/s/files/1/0434/4388/0093/files/wexijolisuwivatip.pdf
    • https://cdn.shopify.com/s/files/1/0433/5609/4614/files/3395260511.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/ncert_math_textbook_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/31298955746.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_off0000b0e6.bin
6e1d7e7ac370219cd1ded318e7ec19c13a6f05947a9d8d501b1ac7ef3654dae1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E6 5400 bytes
font_01_sfnt_off0000c325.bin
ff578eff86e65c2d4b73a941a52acdb9a934ad973dc2027174ada300131d4631
pdf-font-stream PDF embedded font (sfnt) at offset 0xC325 15356 bytes