Malicious PDF — malware analysis report

Static analysis result for SHA-256 487684cc9608b2df…

MALICIOUS

PDF

45.2 KB Created: 2020-08-04 01:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e944fb7527f146a34be22769cca6658e SHA-1: f8504352bb2c41c457e26736fbcf1a022833632f SHA-256: 487684cc9608b2dfd77e3825ff170d389bd21ae8c8a43e0e3f07a607e725df0f
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link to 'ttraff.com', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, displays a title related to an 'anti terrorism day pledge pdf', likely a lure to disguise the malicious intent. The presence of a large number of links, including those hosted on Shopify, indicates a link farm strategy to obscure the ultimate destination.

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=anti+terrorism+day+pledge+pdf
    • http://files.robbfreemethodisthistoricalcentre.com/uploads/1/3/2/6/132681698/bavekurisejifalekum.pdf
    • http://files.benjaminyeo.com/uploads/1/3/0/7/130775953/996bffe999c.pdf
    • http://files.musicianarchive.com/uploads/1/3/1/1/131164573/bepitavikenetijo.pdf
    • http://taxozusa.stfrancisbing.org/uploads/1/3/0/8/130874218/43e06dad.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3320/files/mobirerabew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9187/0375/files/retonumozow.pdf
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/67658690908.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/65007053235.pdf
    • https://cdn.shopify.com/s/files/1/0438/6104/9494/files/tugivel.pdf
    • https://cdn.shopify.com/s/files/1/0437/0864/5541/files/rudot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fonufefijosogigu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2736/files/pitorefivoralit.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/anthropometry_in_ergonomics.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/drivers_license_texas_renewal.pdf
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/13283456528.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9363/files/jezojedutime.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065a2.bin
80bbd23722b9daca9fc36f9aa79674df1b7c86d4a833e1bbda827f0d4b9925a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65A2 5240 bytes
font_01_sfnt_off0000775b.bin
a609fe62ceb8d505083b7639bd2d506d48721a888dcfab95a1cbae3b4adb4973		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775B 10076 bytes
font_02_sfnt_off000099f7.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99F7 4324 bytes

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