Malicious PDF — malware analysis report

Static analysis result for SHA-256 a390c202a59a246a…

MALICIOUS

PDF

38.7 KB Created: 2020-08-13 23:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 806b8cdcd73145a20e3e21ccfb55c278 SHA-1: 72e7a49823f265ca92a2104229812257dc19953d SHA-256: a390c202a59a246ab19e7c8a7dd926c462d60e18cfe916775ea0f9dc3008b5e3
120 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, specifically pointing to 'https://ttraff.ru/pify?keyword=room+on+the+broom+pdf'. This indicates the document's primary purpose is to redirect the user to a malicious site. The PDF also contains a large number of embedded links, many pointing to Shopify, which is characteristic of SEO link farm abuse to obscure the malicious redirector. The document body, though heavily obfuscated, contains the malicious URL.

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.ru/pify?keyword=room+on+the+broom+pdf
    • http://pajigeto.antithesisatelier.com/uploads/1/3/2/8/132814930/827242.pdf
    • http://dufir.thegraphicbrand.com/uploads/1/3/1/1/131164250/naruxibilasinituwip.pdf
    • http://files.transknowledge.co.uk/uploads/1/3/1/4/131408142/9086633.pdf
    • http://files.wanderingmusicians.com/uploads/1/3/0/8/130874305/zumotegejibasilarula.pdf
    • http://files.thaikitchenames.com/uploads/1/3/1/0/131070374/jirolitopir.pdf
    • https://cdn.shopify.com/s/files/1/0434/2520/2325/files/3801884527.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/49464942968.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4705/files/95592453477.pdf
    • https://cdn.shopify.com/s/files/1/0433/9426/9333/files/wanuwumolafujakewi.pdf
    • https://cdn.shopify.com/s/files/1/0450/6081/7048/files/can_data_bus_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/12866723822.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/bitajilopafemafisiso.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/semuzezodopimasomevemezad.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/pikupomulawadefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0445/files/sezaludekipivakekewaxog.pdf
    • https://cdn.shopify.com/s/files/1/0428/7895/9775/files/lafejetaluzunufinojagupos.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/gemoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/kagesekisasulofukalumupuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/93062013799.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_off00005ae6.bin
9b10b13af4ce5f2b2ba216ebc978871c2d046ecc4ff6770f822026f375624728
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE6 5008 bytes
font_01_sfnt_off00006bba.bin
30d475ec5309971e6e234d9de221b06eb245562b2c7340ecc5ef37c7deb00c43
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBA 10064 bytes