Malicious PDF — malware analysis report

Static analysis result for SHA-256 18bdc7d5a0891235…

MALICIOUS

PDF

41.3 KB Created: 2020-08-29 01:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cb61096696984479b1e85714289c20b SHA-1: ad53352134a775573f196b47505f57e7d3d9a9db SHA-256: 18bdc7d5a0891235cf18abe3af5176aa3a06f14f8c55ad19ff2e0314b03fb436
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious content. The document also exhibits characteristics of a PDF link farm, with numerous links to other PDFs hosted on Shopify, suggesting an attempt at SEO manipulation or traffic redirection. The ML classifier strongly indicated maliciousness, supporting the presence of these malicious indicators.

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.com/wix?keyword=jai+ho+mp3+songs+free+download
    • https:///a10.gaanacd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/82243630300.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/balatixenosukar.pdf
    • https://cdn.shopify.com/s/files/1/0438/9348/9832/files/brain_out_game_level_22_answer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puliwaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/kojibepekesivukudapuzafug.pdf
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/sexuvafukufusirup.pdf
    • https://static.usrfiles.com/ugd/b8c837_38247e5847b243f88e3bcc3b10585cce.pdf
    • https://static.usrfiles.com/ugd/b8c837_411edc39752a410a853275659009416e.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e52b149b8db4caea6601ce0d164e053.pdf
    • https://static.usrfiles.com/ugd/b8c837_21a4a7185ed449d0845e68ac0c7f72f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f66660d0f484b9eb01b561995ed23bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_283e40783a034a528e2f92a6d43a4b39.pdf
    • https://static.usrfiles.com/ugd/b8c837_7807c67147024923a9a68799d7abf13d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e28f30ce82144481a06ca84e8cbf376e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2826ded81f9641cfb74f3207228d1a8c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d92.bin
88743c41a5395f80912d2e20a38ad928776d84255a012fd8d23336ab1b26a82f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D92 5408 bytes
font_01_sfnt_off00005fd6.bin
eb96963b9afa7ded2ba8777bb991315698a0de80246bd267f45f7eabddc7eab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD6 13620 bytes
font_02_sfnt_off00008ac5.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC5 4324 bytes

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