Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58940163bab4d6c…

MALICIOUS

PDF

42.9 KB Created: 2020-08-05 12:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba5313f41eb2d3e703ef727192eae54a SHA-1: 3cdd05ac95a7abee52cf81a0733765a260cc2661 SHA-256: e58940163bab4d6c957d4db29c676d132482b22986cf8bca0857f139bb6548fa
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure, disguised as a search query for a PDF document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=list+of+acids+bases+and+salts+pdf
    • http://files.allaboutaustraliancobberdogs.org/uploads/1/3/1/4/131453651/b95d04a6.pdf
    • http://files.kapitiflyfishing.org/uploads/1/3/0/7/130738499/kegevaxiregid.pdf
    • http://files.artistinstudio.net/uploads/1/3/2/6/132681351/4ef04dc6.pdf
    • http://files.shanesimaginenation.org/uploads/1/3/0/7/130775002/c4ed9f2.pdf
    • http://files.marchmontpark.com/uploads/1/3/1/6/131606402/womowe-vutepet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/nikinonab.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4154/files/78152368255.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/52511976281.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2154/files/latamuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/33965234450.pdf
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/fallout_4_ssex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7986/8309/files/meraforawofem.pdf
    • https://cdn.shopify.com/s/files/1/0433/7470/6853/files/gezusuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/1239997015.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/voduwonudovakaka.pdf
    • https://cdn.shopify.com/s/files/1/0429/0271/6572/files/bucket_elevator_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0436/0264/1059/files/zamumosukufo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4748/files/asma_bronkial_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/xabikevolefaxujaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/attila_proving_ground.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_off00006908.bin
b405223a38f9411ca90b82266aa77b12025e4ccfab8b7630c976574e0426f0ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x6908 5136 bytes
font_01_sfnt_off00007a92.bin
2f3f942f88d5146ab2f1f7dbc344562be41d9d83013f8745e80a91d6201a99ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A92 10548 bytes