Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1735b00c55685e…

MALICIOUS

PDF

53.4 KB Created: 2020-07-27 14:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca0ba0c149e110ae21876a3beeccc18f SHA-1: 20e035f47553424ba611356b6ffa44e6a5054a8b SHA-256: fc1735b00c55685eb4c81bf5fe02efa070058062f2e8c47c8f008a2afa99e00a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a redirector at 'ttraff.ru'. The document's content, though heavily obfuscated, appears to be a lure related to an 'Acwa holding annual report'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination and potentially improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=acwa+holding+annual+report
    • http://files.garageshopcustomwoodworking.com/uploads/1/3/1/4/131452902/5887062.pdf
    • http://files.waikatofarmersmarkets.co.nz/uploads/1/3/0/7/130740480/wuluzidalabaf-zilofoxinovoru-rexagovujux-norusugejezowag.pdf
    • http://files.floorstogoblog.com/uploads/1/3/2/7/132740778/zirenukidejazidojav.pdf
    • http://files.wesallenmedia.com/uploads/1/3/1/8/131860125/degis.pdf
    • http://files.waikatofarmersmarkets.co.nz/uploads/1/3/0/7/1307404
    • https://cdn.shopify.com/s/files/1/0434/9778/3458/files/58850872338.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/bodatepupalisekate.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6065/files/tonibutefagupegorupuwovif.pdf
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/78705869588.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xezunegudowafosixezuvi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6099/2927/files/tevugatowuxekipinufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/52364859741.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/wikozapugeregote.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/zifodidosirobakom.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_off000092fc.bin
b917b90a484537a8d3fffa2eac0eaa60aa52cf21089f65e93e162ecdeeaa8cf6
pdf-font-stream PDF embedded font (sfnt) at offset 0x92FC 5120 bytes
font_01_sfnt_off0000a45e.bin
2e8ffb0a1b12f38dcbaa8c311705d5913fc180b1bd6a5faf90deb926d90b8186
pdf-font-stream PDF embedded font (sfnt) at offset 0xA45E 10800 bytes