Malicious PDF — malware analysis report

Static analysis result for SHA-256 32eb541d7861eee1…

MALICIOUS

PDF

47.2 KB Created: 2020-08-21 03:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb794ae6ff609ac9bbcb0dacae2ea7d3 SHA-1: b099e27fa5dfa79d68fd7aeeafcaec0658a44abb SHA-256: 32eb541d7861eee1672aa25855fc0de9bab4af8d29c02c29b3ccc9eb97cb5623
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to shopify.com domains hosting other PDFs, indicative of a link farm or SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious component. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body is largely obfuscated, but the presence of the malicious redirector URL is the highest priority IOC.

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=web+browser+terbaik+android
    • http://files.sparadise.ca/uploads/1/3/1/4/131437107/jetikutijalanik-sarojatenijegis-wivojex-xuwapu.pdf
    • http://began.patrickdonnellypoetry.com/uploads/1/3/1/4/131406082/38fc24.pdf
    • http://pojebije.epathlearning.net/uploads/1/3/1/4/131437919/98d07cd3.pdf
    • http://files.aspenergonomicswellnesssolution.com/uploads/1/3/1/3/131384058/abd789ad8141804.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/pudapebavisurema.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/buzadesatosepeseleno.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2186/files/vimazilizada.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/formulasi_suspensi_antasida.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/muwulonaliboburixoleka.pdf
    • https://cdn.shopify.com/s/files/1/0437/7765/4942/files/wotawima.pdf
    • https://cdn.shopify.com/s/files/1/0431/1013/8017/files/55017362268.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/lekilozifa.pdf
    • https://cdn.shopify.com/s/files/1/0446/6016/2713/files/monosacaridos_reductores.pdf
    • https://cdn.shopify.com/s/files/1/0434/0544/3237/files/fikilamefazumizijufite.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9504/files/jusekanot.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5974/files/40543306953.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/recursive_binary_search_java.pdf
    • https://cdn.shopify.com/s/files/1/0434/6832/5029/files/neet_2020_notification_by_nta.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_off00007a43.bin
6f3993d579682aa58ad54d658b3f4185cf87c3779c15140b2a0f3316dd4059fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A43 5096 bytes
font_01_sfnt_off00008bbd.bin
8eef26b8007763e0f0510283d8b676babd6109810b76897e7dbe983172b676ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBD 10668 bytes

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