Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c63440317d2f4c…

MALICIOUS

PDF

39.0 KB Created: 2020-09-01 04:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32a082d4437ed8a1ea53ef6c9e0bc3c9 SHA-1: 9093f225b302abd202538a9428de84ac7e07a280 SHA-256: b5c63440317d2f4c2875afa159ddf42e360bae5a58209d2bf2750abca19b19c1
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=eclipse+photon+java+ide'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious URL is sufficient to infer a phishing or 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/wix?keyword=eclipse+photon+java+ide
    • https://static.usrfiles.com/ugd/b3bc21_dd2229db11214310bccef3448a2263ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_784bfa14201d4a65a47962ecca116fc2.pdf
    • https://static.usrfiles.com/ugd/738632_1617d74042934c248636452479fc9a36.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b2644d78f39464fa3d97d8f0891de10.pdf
    • https://static.usrfiles.com/ugd/930050_bc477ff9636a413e940811aa8e9caef4.pdf
    • https://cdn.shopify.com/s/files/1/0433/4613/3157/files/vonetusawiwideki.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6314/files/stent_thrombosis_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/ielts_academic_reading_the_impact_of.pdf
    • https://cdn.shopify.com/s/files/1/0428/7676/4327/files/journey_don_t_stop_believin_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/security_deposit_receipt.pdf
    • https://cdn.shopify.com/s/files/1/0429/1624/9767/files/stokke_tripp_trapp_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/the_manual_of_ideas.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7624/files/books_on_java_programming_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0436/3842/3710/files/59895332302.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/98135073228.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/68115545637.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_off00005ade.bin
6f6a096c0b3916987f097f0c5254f7ae7e5f2f27c15d644d4823b43d3252af8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADE 5156 bytes
font_01_sfnt_off00006c77.bin
00df001a47107b39bcd664936d4d01a521dfcd096e70c8de5329e8b2ed2c15db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C77 10176 bytes

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