Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f176c065e14316…

MALICIOUS

PDF

42.4 KB Created: 2020-08-08 06:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53bf75f4995abdf599b5af6d38ebe1b1 SHA-1: 004e49da0407859c023768f3d2a34174e6c29fb3 SHA-256: b6f176c065e14316992266c59cfe5a60764bd127a9ad3640111403bb3501f9cd
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=describing+places+vocabulary+pdf', which is likely used to redirect the user to a malicious site. The presence of numerous shopify.com links suggests an attempt to blend in with legitimate content while masking the malicious redirector.

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=describing+places+vocabulary+pdf
    • http://files.baxplumbing.co.uk/uploads/1/3/1/8/131872273/6c5452.pdf
    • http://powugux.wsbra2020.com/uploads/1/3/0/7/130775607/zovar.pdf
    • http://files.kilmartin.com/uploads/1/3/0/7/130775653/posezibenavin.pdf
    • http://files.thegifthorseathuntcountry.com/uploads/1/3/1/4/131406478/rulojufise.pdf
    • http://magip.rockybutteslides.com/uploads/1/3/1/4/131407089/1624662.pdf
    • https://cdn.shopify.com/s/files/1/0440/6044/2774/files/70734763345.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugogesobiwem.pdf
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/navorinubuwebelaravezatur.pdf
    • https://cdn.shopify.com/s/files/1/0436/9822/5320/files/64837849608.pdf
    • https://cdn.shopify.com/s/files/1/0437/5969/8077/files/calculus_b_v_ramana.pdf
    • https://cdn.shopify.com/s/files/1/0434/9735/7472/files/buvatejipumu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/miboxemos.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/podute.pdf
    • https://cdn.shopify.com/s/files/1/0431/3474/6790/files/30840825087.pdf
    • https://cdn.shopify.com/s/files/1/0435/3749/8276/files/majaxopefoga.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/bobizi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/piwuvugaxiterizexuf.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_off00006726.bin
e373352741926bb62fd695f0f185bc18ac19e5a27876fe04a32d3436d86c732c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6726 5624 bytes
font_01_sfnt_off00007a6c.bin
0071904ae58b39ad9093d0b3f1f619f6671f758020ee0f35b93173ec48631189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6C 10024 bytes

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