Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac22a421a6c643e5…

MALICIOUS

PDF

41.4 KB Created: 2020-08-04 00:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 702e8d030e878e893e670521af7a2d2f SHA-1: fe1dc2c4a71e30ae2b451fcec4d38302bd186b9f SHA-256: ac22a421a6c643e5c849ea3e4370256b8fdf7fd73d30248546de718fe872a73c
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=clep+psychology+practice+test+pdf'. This URL is presented within the document body as a CLEP psychology practice test, indicating a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify-hosted PDFs. The primary malicious URL is likely intended to redirect the user to a phishing or malware distribution site.

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=clep+psychology+practice+test+pdf
    • http://files.gobananaschildcare.com/uploads/1/3/2/6/132695372/2198196.pdf
    • http://files.farhillaussiedoodles.com/uploads/1/3/1/4/131454670/98e3532721.pdf
    • http://files.nvclbaseball.org/uploads/1/3/1/3/131383586/7005378.pdf
    • http://files.anahidskitchen.com/uploads/1/3/1/4/131438226/f4534a9b6f1.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/mirozezefefosujodolalif.pdf
    • https://cdn.shopify.com/s/files/1/0430/9024/7829/files/46696059556.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9217/files/gejururav.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/zewejojojaxox.pdf
    • https://cdn.shopify.com/s/files/1/0435/2399/7856/files/68250777221.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fenajowogotuxukat.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/91729653610.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/53774555682.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0814/files/vuzoba.pdf
    • https://cdn.shopify.com/s/files/1/0435/9992/1315/files/motitu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/mibumujuzi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/59607308210.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_off000061b1.bin
f241d38f4e07dab29d5ea368b18d438a53c442631a48020eb567e34460bbaca4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B1 5424 bytes
font_01_sfnt_off00007423.bin
bf49433fb6771b2507d5c00dfc55e2cc81da4f4dafec814e52ef0fa8fae77c4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7423 10720 bytes

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