Malicious PDF — malware analysis report

Static analysis result for SHA-256 547993241e68c018…

MALICIOUS

PDF

40.5 KB Created: 2020-09-01 12:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdf87bd46c19cb8c6bd2cb72a4d499f6 SHA-1: 75a025e044747bef324076e07dfb2d2a2e10d9fc SHA-256: 547993241e68c0187b6f56469fdb781846cdbf15ce9472db861954eff3a8280a
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'Dr martens shoes size guide'. This link points to ttraff.com, which is flagged as a malicious redirector. The document also contains a large number of embedded links to external PDFs, likely for SEO poisoning or to obscure the malicious redirector. The ML classifier strongly indicated maliciousness.

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=dr+martens+shoes+size+guide
    • https://static.usrfiles.com/ugd/36f25b_f54510c0fda14502b9ea86a1f86667f2.pdf
    • https://static.usrfiles.com/ugd/2d1648_b6887a08d68c423d92ea4b152b01d45f.pdf
    • https://static.usrfiles.com/ugd/e78b77_170e623eb82a4603905047f59179e3f1.pdf
    • https://static.usrfiles.com/ugd/b28561_6db065d859e04e1ebc12085c4563bb4d.pdf
    • https://static.usrfiles.com/ugd/2f07a1_64995da52369498a9519dc3519d65d88.pdf
    • https://cdn.shopify.com/s/files/1/0460/7891/8820/files/58810341339.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/50215628219.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/the_cucumber_book_behaviour_driven_development_for_testers_and_developers.pdf
    • https://cdn.shopify.com/s/files/1/0428/2384/3996/files/21420663239.pdf
    • https://cdn.shopify.com/s/files/1/0437/7437/8138/files/estrategias_de_mercadeo.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_off00005fcc.bin
9888bcff1394930b3c4139a1b4128f375f488cdf30928e10409f2d5874b31b32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCC 5256 bytes
font_01_sfnt_off0000718c.bin
82c083217cd502be59bada9678e46d9837c365765ab01ffb81a91d539805c920		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718C 10636 bytes

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