Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e4618726cf8a0f…

MALICIOUS

PDF

49.6 KB Created: 2020-09-01 06:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cf929120dc7a0d87bdb2e696206a626 SHA-1: 602326dd1a5b9eba3c41fa74abc0d5d23fd1b301 SHA-256: 59e4618726cf8a0f95535d5342f34dab48d51c9c36ebc7c034f40816f60a4a73
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a phishing or scam attempt, using a common topic like 'poetry literary devices pdf' to entice clicks. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=poetry+literary+devices+pdf
    • https://cdn.shopify.com/s/files/1/0431/3759/7596/files/75358512718.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/filolagad.pdf
    • https://cdn.shopify.com/s/files/1/0461/8318/6585/files/bluetooth_peripheral_device_driver_for_dell.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/aptransco_ae_syllabus.pdf
    • https://static.usrfiles.com/ugd/7f16bd_820e884d1a154234af010d540606171d.pdf
    • https://static.usrfiles.com/ugd/405339_3a3ba30ccda3496e917ae8e19bcfb2f1.pdf
    • https://static.usrfiles.com/ugd/361045_42d9de112359429698c88832dba992ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_66ffbac10baa43a1afe90f3009dc55b7.pdf
    • https://cdn.shopify.com/s/files/1/0438/6832/4005/files/baxunebogu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6343/files/gajaguvokatelefuva.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_off00008551.bin
cd01fff32f61f1ec2a9f1dbcfe3ddc42c5f29b9b670befabc4effd7af358f1dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8551 5312 bytes
font_01_sfnt_off00009781.bin
8085873dc57f9d7193071e6f8740d5a185b8ec9c13b9e9cefba34af4d22425fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9781 10120 bytes

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