Malicious PDF — malware analysis report

Static analysis result for SHA-256 cddc20a6ec5ff0e7…

MALICIOUS

PDF

42.0 KB Created: 2020-08-27 15:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a90ae25f92b87d39f46306637b7a35d6 SHA-1: f28f1596e7f86c5a59d881fb14520922c5c344f0 SHA-256: cddc20a6ec5ff0e7627907d9245b3a92b8da9f2f0d0c2f0addcbc4d12645da1d
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=goodgame+empire+building+guide', which is flagged as malicious. Additionally, the document exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The presence of these elements suggests a campaign to drive traffic to malicious sites, likely for phishing or malware distribution.

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.ru/pify?keyword=goodgame+empire+building+guide
    • http://files.glynhaynie.net/uploads/1/3/1/3/131380875/gagawagagoka.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/gasefapuxirubozetik.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/58795073484.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4545/files/uttarakhand_bsc_nursing_entrance_exam_previous_year_question_papers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7887/files/laptop_bluetooth_windows_8.pdf
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/comment_fusionner_deux_fichiers_foxit_reader.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/74543147858.pdf
    • https://cdn.shopify.com/s/files/1/0433/6661/3141/files/carcinoma_de_pequenas_clulas_de_pulmo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7224/0293/files/tuturob.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/18963728912.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_off0000669b.bin
2ce75c0dc1f866d0bf349beead642969d780448f6512360049b90c07fd66be61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669B 5272 bytes
font_01_sfnt_off00007876.bin
33aaf2914783c0c3a5416132f1af564d88a99c1f0a1c9443ec9dbd74d370842c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7876 10288 bytes

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