Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ccde5ba98ed81f…

MALICIOUS

PDF

47.7 KB Created: 2020-08-06 03:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e2ef5c73f9995d060f0251739f6fba3 SHA-1: afb1a9ba18ec3c7fd86d03fb31732893470e7704 SHA-256: a7ccde5ba98ed81fa6a1f3adc5ea888586cb040867cf3bda4e3e4a346d0e1a9e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=html+and+css+interview+questions+pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on various domains, suggesting a link farm or redirection scheme designed to lead users to malicious content. No scripts were extracted from this sample.

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=html+and+css+interview+questions+pdf
    • http://files.miamibikelawyer.com/uploads/1/3/1/3/131380339/9e167f1e6.pdf
    • http://files.bevmcclellanrobynfear.com/uploads/1/3/2/8/132814306/pexebotube.pdf
    • http://files.mrhso.org/uploads/1/3/0/8/130874526/8336049.pdf
    • http://files.poemsandreflections.com/uploads/1/3/0/7/130775897/valunu_jijinos.pdf
    • http://files.vandalsgames.com/uploads/1/3/1/4/131437172/99e88617d.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/8468277861.pdf
    • https://cdn.shopify.com/s/files/1/0437/1942/6198/files/nibaxas.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/fopasosaxejanedisobe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/bizasezifolisipafibosoku.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/24823433520.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/throttlestop_vs_xtu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/80414363068.pdf
    • https://cdn.shopify.com/s/files/1/0440/6309/6984/files/mukugarisawoluje.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3357/files/74792992386.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8102/files/xovasejedowoxanuzemox.pdf
    • https://cdn.shopify.com/s/files/1/0438/8628/0872/files/tavofegomevovulixazom.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3883/files/84504134558.pdf
    • https://cdn.shopify.com/s/files/1/0430/3496/8213/files/85920802035.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_off000071ee.bin
a6d06884fd3dd7523857a423f1af4b5802627c311a5865d2aae0c9a7a962f902
pdf-font-stream PDF embedded font (sfnt) at offset 0x71EE 5540 bytes
font_01_sfnt_off000084bd.bin
846cf528767860cd451488e3df6c0ecc90c8973ef635329b22750a247970468e
pdf-font-stream PDF embedded font (sfnt) at offset 0x84BD 14340 bytes