Malicious PDF — malware analysis report

Static analysis result for SHA-256 d241bd3aea925cae…

MALICIOUS

PDF

42.1 KB Created: 2020-08-02 12:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dbddea399acec36355c43bf619dcf60 SHA-1: 5b2b9455908a5dcf053d232f766c063bb7a3c0f3 SHA-256: d241bd3aea925cae732b96d67e4919d2141cfbaad1bbedbd57c5b2715d14a873
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=honda+eu1000i+manual', suggesting a lure to potentially malicious content disguised as a manual. The presence of numerous links to external PDFs on Shopify domains, alongside the malicious redirector, indicates a likely SEO manipulation or content hosting scheme for malicious purposes.

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=honda+eu1000i+manual
    • http://files.999thewild.net/uploads/1/3/1/3/131380848/ralodenajova.pdf
    • http://files.ldmoates.net/uploads/1/3/0/8/130813988/f0a0b81.pdf
    • http://files.franticband.com/uploads/1/3/0/8/130814397/vinipejatedo-nabopu-jovoxomekopuro-padoga.pdf
    • http://files.almaguinadultlearning.org/uploads/1/3/2/6/132695663/1245712.pdf
    • https://cdn.shopify.com/s/files/1/0430/2598/9785/files/retotedazeva.pdf
    • https://cdn.shopify.com/s/files/1/0428/2908/6876/files/48863932813.pdf
    • https://cdn.shopify.com/s/files/1/0434/9696/4261/files/34287706355.pdf
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/69391343618.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/luzafewojibagufu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/pigifogajid.pdf
    • https://cdn.shopify.com/s/files/1/0432/3619/6507/files/77090309305.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/80392715374.pdf
    • https://cdn.shopify.com/s/files/1/0435/5430/8245/files/kenmore_portable_dishwasher_manual.pdf
    • https://cdn.shopify.com/s/files/1/0447/2481/3977/files/john_deere_240_skid_steer.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/52618195584.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1741436775.pdf
    • https://cdn.shopify.com/s/files/1/0434/7366/6213/files/pokilefefovozobabix.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/walls_csgo_command.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_off00006110.bin
ec92aaa11d650b88373096ffa0c87bad94e548dadc14a56c373426a880a69b5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6110 4852 bytes
font_01_sfnt_off0000717e.bin
932d0d96e7e3ae9e666d591ea9a0f69765a540a7cac6c7341c996ba80be0e97f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x717E 13344 bytes

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