Malicious PDF — malware analysis report

Static analysis result for SHA-256 7974429c989764b3…

MALICIOUS

PDF

49.6 KB Created: 2020-08-10 11:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eab1540b89333872b97d4e7e00af787c SHA-1: fdc16e6423b9a7cc7640a4b389cc9dabd38b4f1e SHA-256: 7974429c989764b3f0c859c828cb504d0e541af89aa98692cdcd3a8928fa06fe
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body itself is heavily obfuscated but contains the same URL. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and lure victims. No scripts were extracted from this sample.

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/pify?keyword=d+d+5e+descent+into+avernus+pdf
    • http://files.cvscpa.org/uploads/1/3/1/8/131856161/594d8bd8d25ca57.pdf
    • http://files.nebraskaeasement.org/uploads/1/3/1/4/131406841/3b13d2aa7ff08.pdf
    • http://files.hldinspections.com/uploads/1/3/0/8/130873921/radoferuso-masok-mogevisi-rawuki.pdf
    • http://files.southeastguttermonkeys.com/uploads/1/3/0/7/130775830/vazedizegomajam.pdf
    • https://cdn.shopify.com/s/files/1/0437/9164/6880/files/90113573573.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/sijizukojaraxiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/8127/6319/files/370_amendment_bill_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/1349/7247/files/excel_vba_form_automation.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/846475267.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4991/files/panegikanipafinanafirov.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/50512620705.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/jabuvifolojibipu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6717/8134/files/sowoselupepavuxukesif.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/degulatugep.pdf
    • https://cdn.shopify.com/s/files/1/0429/0461/7119/files/biwelonebiwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/68447530682.pdf
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/fetutuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/63382765243.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000755f.bin
064694e1c1466bcef2eff31845ed61a5062b8b2634c4698cbaf8dd8c425d5c92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755F 5184 bytes
font_01_sfnt_off00008716.bin
288412a63a53db06da07f6e94d457a79d4d514d31c63ebd0dad17fd591e8ccde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8716 10832 bytes
font_02_sfnt_off0000ab04.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB04 4324 bytes

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