Malicious PDF — malware analysis report

Static analysis result for SHA-256 2677b2b888e88d43…

MALICIOUS

PDF

44.2 KB Created: 2020-08-14 15:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11b2c840c96f953faae4192be36600e0 SHA-1: fcddad696b952f0566c502787e409c20271de2ea SHA-256: 2677b2b888e88d43026052a5835351f669023c8fe1e6f5d3c15b067113e3f431
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains a URL that points to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The presence of numerous embedded links, many pointing to Shopify domains but likely part of a larger link farm, suggests a broad distribution attempt. No scripts were extracted, but the PDF structure itself is designed to lure users to external malicious sites.

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=photosynthesis+lab+report
    • http://tidif.strongbodies.org/uploads/1/3/0/7/130776102/lumikozo-tatuxase-tetazizejuj-juvozo.pdf
    • http://mibejunuv.easternecho.org/uploads/1/3/1/4/131438641/cc21583c630.pdf
    • http://nekajiru.ribreastfeeding.org/uploads/1/3/1/4/131407406/557a4fea0b0c6a3.pdf
    • http://files.jensensiaw.com/uploads/1/3/1/0/131070711/3316835.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/alter_ego_a1_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/7009/5521/files/34406214515.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/vularopizejulipavi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4685/5078/files/xiwuwatebilekovogoviz.pdf
    • https://cdn.shopify.com/s/files/1/0447/2376/5402/files/14399856593.pdf
    • https://cdn.shopify.com/s/files/1/0433/7693/5068/files/camino_island_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/begifitumon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
    • https://cdn.shopify.com/s/files/1/0444/1961/2839/files/vivupirojitiragenekagoze.pdf
    • https://cdn.shopify.com/s/files/1/0428/1932/2022/files/16345869223.pdf
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/20102596851.pdf
    • https://cdn.shopify.com/s/files/1/0448/0414/5309/files/feribozogadus.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_off00006f1b.bin
2d1afbc0be6e9a0511c8a9c6d5cc36e5d2aa9ded399ca5d1958fb4644b671a47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1B 5152 bytes
font_01_sfnt_off0000808d.bin
42e7ceffa423d14159aca2f70e9aa92be3d32b2da0398a1d4b041a10281823f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x808D 10364 bytes

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