Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5efce43607d6520…

MALICIOUS

PDF

45.4 KB Created: 2020-08-21 18:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30e5106fd6912c3d955d561ef8ae18ea SHA-1: ef21cc930e2e24a9017baed70e783e5706de0a67 SHA-256: d5efce43607d6520e39466714eee7b4ddf53fc5a19b429bcdb4e6c712f7e9149
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=diary+of+anne+frank+book+report', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify URLs, suggesting a link farm or redirection tactic. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful content.

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.ru/pify?keyword=diary+of+anne+frank+book+report
    • http://jusadafa.joyfulgivinggroup.com/uploads/1/3/1/3/131398140/fasimoxalinimutusok.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/nuzawukavazusizizazot.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/niwovetumenuzixipofa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/basics_of_communication_systems.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/67680492171.pdf
    • https://cdn.shopify.com/s/files/1/0436/5615/1190/files/13643821027.pdf
    • https://cdn.shopify.com/s/files/1/0437/0310/7752/files/lazeramipuzapiridaka.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/campaniform_sensilla_locomotion.pdf
    • https://cdn.shopify.com/s/files/1/0437/9767/6192/files/82917063017.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2454/files/all_of_me_piano_sheet_music_with_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6721/files/zesekibibowivupopidopi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7748/4196/files/android_studio_mac_no_avd_manager.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/54333676081.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_off000075e7.bin
aa5c60c9f5172ede85e03a87b603fae3da9e7def9ed83029c0bd980b3b924f9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E7 4988 bytes
font_01_sfnt_off00008701.bin
b46423cd8a997e55e5d01abac33ff4b188046ce219573777bf12ceaa1365d34e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8701 9980 bytes