Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6af477b1d81b3c0…

MALICIOUS

PDF

43.7 KB Created: 2020-08-24 20:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb6c80c8145174293d463addb280f1b2 SHA-1: 9a0b7a9864a71cf86be1ea436a6b3279c92f968f SHA-256: f6af477b1d81b3c05ab603080f06adb7a03352e90e21e2d5d83f3742e72c0ae5
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains the text 'Android software names list' and the same URL, suggesting a lure to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify, but at least two others are suspicious. The ML classifier strongly indicated maliciousness.

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=android+software+names+list
    • http://puwipax.marktmueller.com/uploads/1/3/0/8/130874038/1726197.pdf
    • http://files.counselingwithdon.com/uploads/1/3/1/6/131606652/remezur.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2764/files/basic_stock_market_concepts.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1049/files/52628374482.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0872/files/energy_storage_devices.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/lutoxokanezomanexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/29756429372.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/campbell_reece_biology_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/2866/7798/files/zofetakokuvopijelugo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/73541391517.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_off00006eb3.bin
3ef98c8c63911b8d6f5e65904d891dd2728fe1f4edbd5c49a3a3789188681121		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB3 5136 bytes
font_01_sfnt_off0000801f.bin
5fd6629cdab36328d957f5e7e907a5f6b1f32454d9d98299d3188cbf8dcc9450		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801F 9964 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.