Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4836fdcafe9a977…

MALICIOUS

PDF

48.3 KB Created: 2020-07-24 23:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2447af4c6829afb5844117da50e88ad SHA-1: 7caf445ba7ece401b75136b698daedf575aa4438 SHA-256: e4836fdcafe9a97738d3d52199255ada099e92178ef81c327be608da4b825527
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'scorched earth 2018 movie' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=scorched+earth+2018+movie
    • http://files.tacomaartistlofts.com/uploads/1/3/1/6/131636586/vizomilum.pdf
    • http://files.potentialistworkshop.com/uploads/1/3/1/3/131379375/2899574.pdf
    • http://files.solomonlaboratory.com/uploads/1/3/1/0/131070867/nafajizuvi-famoku-vuditipo.pdf
    • http://files.padmacandra.com/uploads/1/3/1/6/131606175/67cb0ae22.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/bavixakagowuwuwuriwozefe.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/437800162.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/ferasigipux.pdf
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/71119811086.pdf
    • https://cdn.shopify.com/s/files/1/0439/1269/1880/files/73055974222.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33540287451.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3834/3322/files/jopelumasido.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutowoterefabobenovise.pdf
    • https://cdn.shopify.com/s/files/1/0440/1315/8565/files/98572930349.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/wilibepemozo.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/
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/71119811086.p

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f71.bin
1e00dcb5cf1fc27afa8f6d36aa9e047ad7b978121a9067915c7c71b1e3201ae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F71 5336 bytes
font_01_sfnt_off00009192.bin
b8832eac782744a388ce4a3f881473ffbad37c4b2bb41267be6ff5c9a574c9e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9192 10212 bytes

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