Malicious PDF — malware analysis report

Static analysis result for SHA-256 5100c504c2d9cfdd…

MALICIOUS

PDF

47.3 KB Created: 2020-08-01 16:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0de62b1cb9c67ad88a3d56994b60a186 SHA-1: 8abd1e0772ab9dca10ff33656516f441c55ac7cc SHA-256: 5100c504c2d9cfddc82f9cf57ccab014835704c7dc4c3939bd02f9e8d7e31195
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a large number of embedded links, many pointing to external PDF files. One critical heuristic identified a link to known malicious redirector infrastructure (https://ttraff.cc/pify?keyword=canon+ir+advance+c5250+driver), suggesting a phishing or redirection attempt. The document body contains garbled text but includes the same redirector URL and several Shopify-hosted PDF links, reinforcing the link farm and potential redirection attack pattern.

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.cc/pify?keyword=canon+ir+advance+c5250+driver
    • http://files.walquistwriting.com/uploads/1/3/1/8/131871583/videmololuwur-zovuzurubon-putinutimed-nazabofege.pdf
    • http://files.bugsandbiology.org/uploads/1/3/0/7/130739928/sasadeduzosaxef_kopomasonifam.pdf
    • http://files.sunnylearning.com/uploads/1/3/1/6/131606127/wexazamibepot_fujosi_kununewim.pdf
    • http://files.leavingtheninetynine.org/uploads/1/3/1/0/131070457/316faa4.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2054/files/31046643323.pdf
    • https://cdn.shopify.com/s/files/1/0431/9916/8673/files/kagezonagagadek.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8423/files/jugulixofox.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/57525469891.pdf
    • https://cdn.shopify.com/s/files/1/0430/6980/0597/files/fikakidag.pdf
    • https://cdn.shopify.com/s/files/1/0439/1819/6891/files/zarexesamijivemakovo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/valunax.pdf
    • https://cdn.shopify.com/s/files/1/0431/0754/9338/files/underscore_sortby_desc.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/dajuvaditemalututelaza.pdf
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/jitixosekubudukevidudi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1297/9869/files/vegiribivi.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_off00006568.bin
229614a59359ed32b651e192abafdff5b0f8d20245a49efacbc7df51149f9f9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6568 4912 bytes
font_01_sfnt_off00007626.bin
e8e7f198737d8b7631d54bf0cde80704daa52feb0417d85f11e3cf6936cb6bbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7626 13948 bytes
font_02_sfnt_off0000a1cf.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1CF 4324 bytes

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