Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a83b579ce4a1c70…

MALICIOUS

PDF

49.9 KB Created: 2020-08-14 23:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5b3389ec7aac286685713d0cbccfcb5 SHA-1: 13f312b7cc686b153ba3024266cde3e0fe5c267b SHA-256: 9a83b579ce4a1c702cb89bdbc9d6c2d13ae3096dc5bf4ccbd67a729ef61d5710
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links, many hosted on Shopify. The embedded URL 'https://ttraff.ru/pify?keyword=c+boost++file+from+url' is the primary indicator of malicious intent, likely serving as a lure for a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains the same URL, reinforcing its significance.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=c+boost++file+from+url
    • http://zepamonin.serenity-gbd.co.uk/uploads/1/3/1/4/131437535/4138441.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/rarexejumerek.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/manual_dexterity_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/6284/5859/files/69857780806.pdf
    • https://cdn.shopify.com/s/files/1/0440/7823/5798/files/balanced_parentheses_c.pdf
    • https://cdn.shopify.com/s/files/1/0437/5894/4405/files/91650030240.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/71175950821.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/14824576689.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/geparudufexesaxetowutig.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/zonukuzaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/livedusiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/72912747077.pdf
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/82558669902.pdf
    • https://cdn.shopify.com/s/files/1/0440/4445/2005/files/consumer_key_twitter.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007628.bin
71f2e0c3d9f410c2cafcb7ce1dbef5c5621f212c26a646b2a9256cd4d8ebfc16
pdf-font-stream PDF embedded font (sfnt) at offset 0x7628 3688 bytes
font_01_sfnt_off0000836e.bin
d3f6e787c37d27959532a05de1cb4d7d39b9d87e25e0bcf4d4fdfec6356a8535
pdf-font-stream PDF embedded font (sfnt) at offset 0x836E 4748 bytes
font_02_sfnt_off00009371.bin
82a701288eedac74ad754f782743d0c4b913ae025d233079eb5eab1567ea50bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x9371 11476 bytes