Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57a8e09dc6af2e0…

MALICIOUS

PDF

47.5 KB Created: 2020-08-12 21:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 356c9ee2da591babc4cd66f4706a5419 SHA-1: 107664ab4e33be0d08d451d586be026ca95eb39f SHA-256: d57a8e09dc6af2e0ea29d0523d96d619ba52b932d5237d9a70550b5d0d119443
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and embedded artifacts reveal a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm or redirection scheme. The primary malicious URL identified is https://ttraff.com/pify?keyword=rig+veda+odia+pdf, which likely serves as a gateway to further 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.com/pify?keyword=rig+veda+odia+pdf
    • http://files.mommyandmeadventures.net/uploads/1/3/1/4/131437074/5824321.pdf
    • http://files.coryhisle.com/uploads/1/3/1/3/131383294/dinusu-jorogelunitovan-bexisewe.pdf
    • http://mogejoj.vipfrenchnannies.com/uploads/1/3/1/3/131378950/wupilupigupezebir.pdf
    • http://files.anniepercussion.com/uploads/1/3/2/7/132740321/disatibe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/wibisajepovuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/7837/5831/files/africa_twin_2020_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1510/9797/files/zoo_tycoon_2_aurora_designs.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/lolizefoku.pdf
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/letter_of_reprimand.pdf
    • https://cdn.shopify.com/s/files/1/0438/2641/3725/files/pc_optimizer_pro_number.pdf
    • https://cdn.shopify.com/s/files/1/0433/2063/9646/files/tipeluzasipuvepeliv.pdf
    • https://cdn.shopify.com/s/files/1/0436/3311/5289/files/890258373.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4583/files/70578138940.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/add_watermark_mac_preview.pdf
    • https://cdn.shopify.com/s/files/1/0435/7488/6563/files/nurutaxulekuturalibul.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/standard_access_control_list.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_off0000757c.bin
9598f7fb7a9b9dbc8c987dfae97b3b66b4d16fcd798a3f57030d67a046c89767		 pdf-font-stream PDF embedded font (sfnt) at offset 0x757C 4972 bytes
font_01_sfnt_off0000868c.bin
e07e3b6db7df4f8c3987028f37bc26e49810ceb2e8730be85179e32f300eda6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x868C 13516 bytes

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