Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9bce9037b72d905…

MALICIOUS

PDF

49.7 KB Created: 2020-08-04 15:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1da4e19fc4809a235f03250561cd210 SHA-1: 181352292274122334329e02621cdaafbe6f5cc8 SHA-256: d9bce9037b72d905d6f6f7b5e243747b559843f7e2e491a66f5796e914b11e89
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector hosted on 'ttraff.ru' which is flagged as malicious. The document body, though heavily obfuscated, appears to contain the same URL and references to car manuals, suggesting a lure to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to 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/wb?keyword=transmission%20fluid%20change%20manual%20car
    • http://files.readingthechinadream.com/uploads/1/3/1/0/131069887/kebekod.pdf
    • http://files.mrlukewayne.com/uploads/1/3/0/7/130775429/b135ce.pdf
    • http://files.habitualspender.com/uploads/1/3/1/4/131453348/sivoj.pdf
    • http://files.dobwallsjuniorsfc.co.uk/uploads/1/3/1/3/131398143/vebuvobubaluxipoju.pdf
    • http://ruzuxuxo.ahbuildingservices.com/uploads/1/3/0/7/130740051/5fae8730b40.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/32155702153.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/4608282591.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/how_to_add_artboards_in_illustrator.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9563/files/kurokekologutolewiludowix.pdf
    • https://cdn.shopify.com/s/files/1/0432/0198/6723/files/85961776176.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/lifigefakixilotibox.pdf
    • https://cdn.shopify.com/s/files/1/0429/8748/7385/files/66582178069.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/13126361084.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/jebotedesuveb.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/80298262883.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_off00008432.bin
44b135a588bf61c35a27c8f762aac2e53057c800f4e4295356bf6b46d689727a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8432 5384 bytes
font_01_sfnt_off0000964e.bin
fa2ff3ca5a311356d6649d6feba2b5b994d28e20b86c96760c1da6573eec43eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x964E 10428 bytes