Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c27edad93cd8f20…

MALICIOUS

PDF

46.2 KB Created: 2020-08-08 13:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6300b44c7acd399466b7db2090b015e SHA-1: b3a40ea11aa38420e61658d5c76d4029c65028c9 SHA-256: 6c27edad93cd8f20dee2ea9aa80c3db4f3a953b160e73ab0422bf1ac5de8eba8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, constituting a link farm, with a primary redirector pointing to the known malicious domain ttraff.ru. This indicates a likely attempt to direct users to malicious content or phishing sites. The ML classifier also strongly flagged this PDF as malicious.

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=knowing+god+james+packer+pdf
    • http://files.hockeyuanalytics.com/uploads/1/3/1/0/131070872/rekigi.pdf
    • http://files.relevantpublishers.com/uploads/1/3/1/3/131380063/ba6197512ca8c.pdf
    • http://files.rachelburn.com/uploads/1/3/1/6/131607019/digemiz.pdf
    • http://files.sfepiphany.org/uploads/1/3/2/7/132740978/samila-fojizumomomuguf-bedimebatanu.pdf
    • http://files.newahecevents.org/uploads/1/3/2/3/132302963/81ca96653.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/98220162775.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/patidiwaxirafa.pdf
    • https://cdn.shopify.com/s/files/1/0439/0774/3899/files/fatosawe.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/12916854593.pdf
    • https://cdn.shopify.com/s/files/1/0433/6015/7855/files/93638931340.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6661/files/sazomamikilozudixaxunez.pdf
    • https://cdn.shopify.com/s/files/1/0431/5388/3293/files/21730587076.pdf
    • https://cdn.shopify.com/s/files/1/0429/2847/2220/files/rudiwifizowiwerivuvolas.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3100/files/lajexufonowowaxumawemuzo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/nefodirumasimujokesozu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3822/9158/files/japinilaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/1257/0787/files/vodap.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/10976743502.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000762a.bin
2454c68c5f4d6d1aa692a210d9ec186974488aaac1db3531ff67744af87d84a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x762A 5644 bytes
font_01_sfnt_off0000896e.bin
893be7c315d6ff912ff648f7a33e259a64a5ac46857b6a47bc68c53ef7019a7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x896E 10232 bytes

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