Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db5617cb7f13e9e…

MALICIOUS

PDF

50.4 KB Created: 2020-08-05 14:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b639d7137e0bc5c7707fb51f1d95b1f9 SHA-1: fffcd5a8fc00a90dbdbe618dd9b43fc453d25faf SHA-256: 4db5617cb7f13e9eee12fe87886a62db3b7f578bb5149730a48bf0ffc1cbff33
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL, https://ttraff.com/pify?keyword=anomalie+de+liquide+amniotique+pdf, is likely used to redirect users to a phishing or malware-hosting site. The document body, though heavily obfuscated, contains this URL and references to other PDFs hosted on Shopify, suggesting a coordinated effort to distribute malicious content through a large number of links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=anomalie+de+liquide+amniotique+pdf
    • http://muzej.carsnc.com.au/uploads/1/3/2/7/132740805/dinugod-ninujolokole.pdf
    • http://files.subsurfacescuba.com/uploads/1/3/2/6/132681501/fokupof.pdf
    • http://fetidek.inslichtlab.com/uploads/1/3/1/4/131408100/266916.pdf
    • http://files.cliftonrefugeesponsorship.co.uk/uploads/1/3/0/9/130969046/6049883.pdf
    • http://files.debraeng.com/uploads/1/3/1/4/131407901/9ef697.pdf
    • https://cdn.shopify.com/s/files/1/0437/5327/5546/files/61812780959.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/kenuraziberuje.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/levuwogogedenekexuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/zufunarubijomewuwam.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/857006265.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/basic_spanish_grammar_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/9955/3959/files/gexexugumowufeteril.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/43208192250.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/62267205328.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78549170372.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/59355649306.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/developmental_psychology_childhood_and_adolescence.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/20203026815.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_off000075a4.bin
771199cebb3fb075f518da454a7e425f0f58ea5f3bb3660824f479951388b278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A4 4912 bytes
font_01_sfnt_off00008639.bin
ac33b29edc0cfd13758fadd7eff6b702f7ad4f62f4ded5a333461e3202dac557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8639 12224 bytes
font_02_sfnt_off0000ac29.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC29 4324 bytes

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