Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be45f6df760c70a…

MALICIOUS

PDF

43.7 KB Created: 2020-08-18 14:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c20c3a9c18bce2a976a80585c863973 SHA-1: 6e7f58e975f7defb4e782a96645dc2839b1295a7 SHA-256: 2be45f6df760c70a1a9a764a6e6268496285b3ff15c2f183d2c2a3d3bb1b8ade
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing for a PDF link farm. One of the primary links directs to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination or serve malicious content. The document body, though heavily obfuscated, also contains this redirector URL.

Heuristics 3

  • 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.
  • 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=types+of+joints+in+sheet+metal+work
    • http://files.kathrynemyoung.com/uploads/1/3/1/0/131071076/porewuvofadaxa.pdf
    • http://files.larissafall.com/uploads/1/3/0/9/130969873/namoralonosufirif.pdf
    • http://zetejudib.ignaciocarballo.com/uploads/1/3/1/0/131070374/f548a6.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/mathematics_for_engineers_a_modern_interactive_approach.pdf
    • https://cdn.shopify.com/s/files/1/0447/3470/9914/files/ksiki_po_angielsku_dla_dzieci_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/65643470138.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/32543295319.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/dotuwikebas.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/pekezafupalowix.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/9218358057.pdf
    • https://cdn.shopify.com/s/files/1/0434/7419/0498/files/482959915.pdf
    • https://cdn.shopify.com/s/files/1/0434/3352/5400/files/mafomujoxiratoxalazepaki.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/vefisuvov.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/46529887080.pdf
    • https://cdn.shopify.com/s/files/1/0433/5550/4795/files/dobajabulopavat.pdf
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/pufeligojerolijuvaxotajin.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_off00006dfb.bin
2ca996e1bbcaf046f8f68b58e960d4ed0d6a490bdb1016101d276ec9c9392c5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFB 5424 bytes
font_01_sfnt_off0000805e.bin
721e5f72e1fb200645ad0118c27965fd6b4b997e80f132d9aba582c5af78b00b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x805E 9848 bytes

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