Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f86431a2c27a9f…

MALICIOUS

PDF

121.1 KB Created: 2020-08-14 04:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 201fd70400d99a5403b37f6613a41ddb SHA-1: bd7bd61a50ee7ab88a8a970ed8f6d51b4f84ba17 SHA-256: 46f86431a2c27a9f3e21fc45decb3f22c016a9ec18cb3d9d3eb57c0cb9123309
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'trophy guide'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly indicates malicious intent, likely for phishing or scamming purposes. The ML classifier also flagged this PDF with high confidence.

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.ru/pify?keyword=akiba%2527+s+trip+trophy+guide
    • http://files.mediaroommarketing.com/uploads/1/3/1/8/131856185/zusoturopeto-pewovavopilod-mogikobopakol.pdf
    • http://files.littlegreenjeep.com/uploads/1/3/0/8/130813747/8549735.pdf
    • http://files.nathankhensley.net/uploads/1/3/0/7/130775427/ranulesatu.pdf
    • https://cdn.shopify.com/s/files/1/0447/8969/4630/files/kazixulajafewalederujele.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/graphene_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/1036/6362/files/bebotibilujobu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6557/3537/files/jzyk_angielski_podstawowe_zwroty.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/logitonapivelabazuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0099/files/98_pontiac_bonneville.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/abhijit_banerjee_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4454/files/71023228356.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/83846124743.pdf
    • https://cdn.shopify.com/s/files/1/0436/3878/4158/files/52614926539.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000141b3.bin
12de3a60e849496f9b45946c637ac9e7ec160a40f3d9d55274ec03023a951760		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141B3 17912 bytes
font_01_sfnt_off00017b3d.bin
0eed5202df8075fc62d414222bc8aa238efd606a5a793441b41eb41818ef73a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17B3D 5516 bytes
font_02_sfnt_off00018df3.bin
716779e49bb32d84c3b7c915dedaf68cbdd481a7779a8fbecbef320bcc8bbd00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18DF3 16976 bytes
font_03_sfnt_off0001c250.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C250 16092 bytes

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