Malicious PDF — malware analysis report

Static analysis result for SHA-256 9447309e27563a20…

MALICIOUS

PDF

45.8 KB Created: 2020-08-26 00:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e591923c2b7476a0f465452690c14c54 SHA-1: 72fd9a464e8d97f3c9e802a551f3dd0b0aecab6a SHA-256: 9447309e27563a2033e02b3cd77b6dc980e89b91b4857b972166f760fa284d4f
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.com/pify?keyword=b-27+silhouette+target+scoring', points to known malicious redirector infrastructure. The presence of a large number of external PDF links, many hosted on benign platforms like Shopify but likely serving as decoys or part of a larger distribution network, suggests a campaign to lure users to malicious sites. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

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=b-27+silhouette+target+scoring
    • http://files.cartiercouturee.com/uploads/1/3/0/7/130775174/4009071.pdf
    • http://gibop.redteddypup.com/uploads/1/3/1/6/131637036/dinafawotugopil-dupifekonumupol.pdf
    • http://files.anna-walker-research.com/uploads/1/3/1/4/131414134/wuvifufetabok.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6758/files/wapuligowavekeluxuge.pdf
    • https://cdn.shopify.com/s/files/1/0430/6318/1463/files/42418371459.pdf
    • https://cdn.shopify.com/s/files/1/0434/4381/4556/files/dadoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/44320826340.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/2338632881.pdf
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/77775866920.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/suramagufumaxuragozud.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1101/files/muxusawizufen.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/nirivofusasukisub.pdf
    • https://cdn.shopify.com/s/files/1/0438/8985/2568/files/skin_biopsy_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0434/9027/9574/files/mapomutol.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4968/files/ncert_chemistry_book_class_11_free_download_part_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/dipep.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/cancer_de_mama_prevencion.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_off0000726d.bin
eb55c59cb3a8ae22b72c4d5bcc2d4d7e71b1b578310a8977001af41d175364a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726D 5356 bytes
font_01_sfnt_off000084a2.bin
789d62a6601d579178d4fb7444535f77ce27648bf2058afe8ce9e1fafee83746		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84A2 11152 bytes

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