Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1cb361e88c702f…

MALICIOUS

PDF

45.5 KB Created: 2020-08-04 18:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 715b538e2160bb62e291d8f31a04f0a7 SHA-1: 95e6bf79c19dcd2df93bcbd66d1870f4f4fca7ca SHA-256: 5e1cb361e88c702ff776830b7c980784473adb2162aa48328c87b11c689ed900
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded links, many of which point to a link farm designed to redirect users to potentially malicious infrastructure. The primary redirector URL identified is https://ttraff.ru/pify?keyword=workplace+conflict+definition+pdf. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to lure users to external, untrusted resources, likely for phishing or malware distribution.

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=workplace+conflict+definition+pdf
    • http://files.rosellaleslie.com/uploads/1/3/0/7/130775228/cdc6e5f74e2.pdf
    • http://files.gingerbreadmanduluth.com/uploads/1/3/2/3/132303081/9285d09effe.pdf
    • http://files.1jpn.org/uploads/1/3/1/3/131397934/e65da415d965abf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/principle_centered_leadership_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/toriwanoxaluki.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/wekavumabebodofe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/50808374762.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/ponenibaku.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/31261821102.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0610/files/naziz.pdf
    • https://cdn.shopify.com/s/files/1/0440/5493/7765/files/retemuzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/cbse_class_12_ncert_biology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/7421/6351/files/detelubuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1576/files/anecdote_in_a_sentence.pdf
    • https://cdn.shopify.com/s/files/1/0432/7371/5880/files/sql_server_2020_enterprise_edition_installation_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5175/files/zopolejoxalelopapogave.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zejakepujubuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/word_one_page_landscape.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067d4.bin
be26e5932ec0c04cd49d3804f87bb51736475b2a568b5a02532d75b4a142370b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D4 4836 bytes
font_01_sfnt_off0000785b.bin
7ffcfd347795239d0a32d04528231e61ccc901a28268f91e29da86b3dce453a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x785B 10032 bytes
font_02_sfnt_off00009aa7.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA7 4324 bytes

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