Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5563b4af643adf…

MALICIOUS

PDF

46.5 KB Created: 2020-08-11 06:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db2ecf476a3550711d646edf8c0492ee SHA-1: 0c914fc302777989cde5ea8720a3b9c7875985ca SHA-256: 9f5563b4af643adf8160c508e24a4d90a282de3d3572a08d127ac761e3a41467
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one to a known malicious redirector at 'https://ttraff.ru/pify?keyword=periodic+table+pdf+with+electron+configurations'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of numerous other links, many pointing to Shopify domains with seemingly random filenames, indicates a link farm or SEO manipulation tactic to distribute the malicious content.

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=periodic+table+pdf+with+electron+configurations
    • http://files.sugarmommascookieco.com/uploads/1/3/0/9/130968933/xadizaxasezawazapu.pdf
    • http://files.whitetailtents.com/uploads/1/3/1/6/131637016/sejesurilalif-danedokefab-tonevapafitato-gabenaf.pdf
    • http://files.pauladuartetango.com/uploads/1/3/2/6/132695543/b2814c54943237.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/advantages_of_eclectic_approach.pdf
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/dugokipinibafu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6414/files/autosuggestion_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57515970725.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8723/files/64694436009.pdf
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/zeguvopugi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/mahouka_koukou_no_rettousei_episode_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/xafon.pdf
    • https://cdn.shopify.com/s/files/1/0432/8819/9328/files/bodamu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/golerizi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3247/5810/files/39494484594.pdf
    • https://cdn.shopify.com/s/files/1/0443/0928/2972/files/zane_quible_administrative_office_management.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_off00006eab.bin
93108274d1b2b9f5a930833a91043e14924b1eb4bfd3d8d0ecd97bf6c2feb348		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAB 5652 bytes
font_01_sfnt_off000081e5.bin
a943971f8cf8396843f319e3472ff0c0477ee0140f11a7b1f8ba7f4a84373420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E5 13424 bytes

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