Malicious PDF — malware analysis report

Static analysis result for SHA-256 018802fe6c6c4a3d…

MALICIOUS

PDF

130.9 KB Created: 2020-08-11 23:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc45a92921fad149b90f60d02b48c80b SHA-1: e6c8e79061f43d8fcae3acc350330d574d334e60 SHA-256: 018802fe6c6c4a3d0977e1856f6d81186e893410aa6d7dcb736dacf9dac5b61d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the target URL, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=oxford+classical+dictionary+abbreviations+pdf
    • http://limipaz.natomasschoolofmusic.com/uploads/1/3/1/4/131454012/cf4711fc94141f5.pdf
    • http://files.mattcameron949.com/uploads/1/3/0/7/130776054/4756696.pdf
    • http://files.psuactsci.com/uploads/1/3/1/4/131406659/9954d0a2faa35.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9182/0711/files/25984979324.pdf
    • https://cdn.shopify.com/s/files/1/0436/4464/9630/files/27081952271.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/fosotoxarobotukusex.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/the_canterbury_tales_modern_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/kivur.pdf
    • https://cdn.shopify.com/s/files/1/0436/4143/8366/files/87292196450.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/konuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/1705/2066/files/83194518832.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/razezezizaneketubupumekud.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/topuvaripelisulew.pdf
    • https://cdn.shopify.com/s/files/1/0439/1724/6632/files/tamuvokomufuzujavo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7935/8869/files/12104230786.pdf
    • https://cdn.shopify.com/s/files/1/0436/9232/7077/files/rogoxunutazutidepuni.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/kozilubugukerevojuwada.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001910d.bin
b41bea1b6452f752dbfebed22a84b2b90fbc40f7202eadc28c3945cc57bd146b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1910D 2868 bytes
font_01_sfnt_off00019b40.bin
8b839d33029fe6f04c6f83f9be23d4192b8a8b4d29cf0c9500457298295f13c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19B40 5548 bytes
font_02_sfnt_off0001ae39.bin
44d59505aeca8acfcbb0644808e75223826716a910a4d2bc0767e9a58a41b28a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE39 20404 bytes
font_03_sfnt_off0001e793.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E793 16204 bytes

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