Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ffc638c5e1649ac…

MALICIOUS

PDF

47.4 KB Created: 2020-08-04 09:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e2737250becb7a21e823725e87161d6 SHA-1: eec2d2115900024c2f4d7e718aaaee980b137082 SHA-256: 3ffc638c5e1649ac96ff94253e9982b6575c4dca510fb05f62d5d5dd608800a4
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary URL, 'https://ttraff.ru/pify?keyword=die+casting+defects+causes+and+solutions+pdf', is likely used to obscure the final destination. The document body, though heavily obfuscated, contains similar URLs, suggesting a content-luring or phishing attempt.

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=die+casting+defects+causes+and+solutions+pdf
    • http://files.simplycfood.com/uploads/1/3/1/3/131381679/supapinatopowu.pdf
    • http://files.itinerariesofahummingbird.com/uploads/1/3/2/7/132740541/kuwetofisoma.pdf
    • http://files.shopmilou.com/uploads/1/3/1/4/131483955/123771.pdf
    • https://cdn.shopify.com/s/files/1/0435/9274/5117/files/45881401376.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/88635932089.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/88048786484.pdf
    • https://cdn.shopify.com/s/files/1/0434/6635/8934/files/85865899861.pdf
    • https://cdn.shopify.com/s/files/1/0430/0839/3369/files/26318893886.pdf
    • https://cdn.shopify.com/s/files/1/0438/6275/3445/files/bitewaja.pdf
    • https://cdn.shopify.com/s/files/1/0438/9568/5288/files/loxarenivogerudutifix.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/rafexuvaririlexodefuguk.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3367/files/puxatapinojatidisakowubiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2230/files/40957217382.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3082/files/how_to_run._sh_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/pinigotodunozojum.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e92.bin
3a734a65a8ac6f93d66d9235dbcc4837d727848dbb45b55ebdee7cada9b19294		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E92 5108 bytes
font_01_sfnt_off00008008.bin
61126c38bd09a61bbc6107f7851f6324ed41b645fa6c992e1663fa41317419d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8008 10064 bytes
font_02_sfnt_off0000a25e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA25E 4324 bytes

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