Malicious PDF — malware analysis report

Static analysis result for SHA-256 457cc1d550ba8fe8…

MALICIOUS

PDF

54.6 KB Created: 2020-08-07 02:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d68aa7f44838ab016341fbea248b076c SHA-1: 7eb26ac9f578da6219a8b259d0136bf1d8cda1e5 SHA-256: 457cc1d550ba8fe83222025edb5d9c6ff0d6fa2757e7878f602ebe5b8f8c44b2
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to Shopify-hosted files, forming a link farm. One of the primary links redirects through 'ttraff.com', a known malicious redirector, suggesting an attempt to lure users to malicious content under the guise of providing a technical document. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=centrifugal+pump+design+book+pdf
    • http://mizorag.toddspianoservice.com/uploads/1/3/1/4/131482975/lefunewino.pdf
    • http://fapinuwi.mrgeorgesworld.com/uploads/1/3/2/3/132302921/liwoviduxuxad_gazikagesowikez_valakami_padurovoxidaju.pdf
    • http://files.kristieminer.com/uploads/1/3/2/6/132683328/pusimagi.pdf
    • http://files.fatherbrowning.com/uploads/1/3/1/6/131637219/6950c9d11c6.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/meruwesuwada.pdf
    • https://cdn.shopify.com/s/files/1/0429/8434/1657/files/58476340959.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/21175628996.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/anchorage_in_orthodontics.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/wavosomarokewevitebukezi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4577/files/gukisanewuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/zofuda.pdf
    • https://cdn.shopify.com/s/files/1/0435/4650/9467/files/95761446482.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/mifokafaxapijiwovon.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/34692633915.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/fimobuxuwazosifowimelib.pdf
    • https://cdn.shopify.com/s/files/1/0438/3513/0018/files/algebra_worksheets_year_7.pdf
    • https://cdn.shopify.com/s/files/1/0434/3499/9975/files/57549954220.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_off0000974c.bin
a34aacdb16ac4e8ff1ec69dae8f30bc7b370ec9ec7425d008b4ce54f9507d184
pdf-font-stream PDF embedded font (sfnt) at offset 0x974C 5472 bytes
font_01_sfnt_off0000a9c8.bin
06147395bf273312c2446a5d6d9c5010f55b0bbba399fa7169957c17455676b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9C8 10364 bytes