Malicious PDF — malware analysis report

Static analysis result for SHA-256 455abc73470defa1…

MALICIOUS

PDF

40.8 KB Created: 2020-08-19 01:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e616e4dc0c8d5d5da8837f20f7e26f59 SHA-1: 565d796ed936fd426c1e01807ea877e7a787a9ca SHA-256: 455abc73470defa16015abfe617ab6f259283440f36f8f29e906e1fa7e7dd955
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. This URL is designed to redirect users to further malicious content. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting other PDFs. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link within the document, likely leading to a phishing page or malware download.

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.cc/pify?keyword=company+balance+sheet+form
    • http://xameg.lucky13bookreviews.com/uploads/1/3/1/6/131637814/paxefiwegori.pdf
    • http://files.coloradoriverscape.org/uploads/1/3/1/4/131438427/00ba6e0101c.pdf
    • http://nurufe.petesenoffphotographics.com/uploads/1/3/1/4/131408899/belawaseman.pdf
    • https://cdn.shopify.com/s/files/1/0428/7676/4327/files/11773588900.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/papababanagaratewujab.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/jibok.pdf
    • https://cdn.shopify.com/s/files/1/0434/5751/1590/files/24445226831.pdf
    • https://cdn.shopify.com/s/files/1/0429/5757/0207/files/developmental_biology_scott_gilbert_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/5156/5724/files/arvo_part_cantus_in_memoriam_benjamin_britten.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/the_boyfriend_list_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2727/files/99658415624.pdf
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/lupulitiguzudojote.pdf
    • https://cdn.shopify.com/s/files/1/0437/5642/1278/files/44381273298.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/makakifenobifokovafona.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/tanixilofugutopukitofol.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/majelaxo.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_off00006368.bin
917350374605859fa9249b7baafcdc59a84ea3ee5f9601fb4492874d0fb5765e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6368 5404 bytes
font_01_sfnt_off00007597.bin
25f405104fe0ddeed0f914bf52ab943cd2791088a16c2d0164e8ab5d5cc878fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7597 9676 bytes

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