Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cdd9cd61cbea63e…

MALICIOUS

PDF

36.9 KB Created: 2020-08-24 19:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26e0223ccba54db19645b2394e8b7916 SHA-1: f678c620ef5a7ca28fa27b835a3302a273b06dd9 SHA-256: 6cdd9cd61cbea63e9ebf7e3566bae88e03c250ae5d0b25ed3330475800783cbe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous Shopify URLs, many flagged as benign, indicates a link farm strategy to obscure the malicious destination.

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.com/pify?keyword=gameboy+apk+games
    • http://files.eastbayayurveda.com/uploads/1/3/0/7/130776037/9f7940e685.pdf
    • http://files.viaserena.net/uploads/1/3/1/4/131411024/0b71e59006a02.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7291/2549/files/convert_google_sheet_to.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/reading_and_writing_1_bachillerato.pdf
    • https://cdn.shopify.com/s/files/1/0428/8872/4639/files/populurit.pdf
    • https://cdn.shopify.com/s/files/1/0436/9154/0634/files/simodaxunapumam.pdf
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/nimewadofetokobiluzaderut.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7501/files/tediforakigodinifubabi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7781/9802/files/nemosinuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5029/files/23661703817.pdf
    • https://cdn.shopify.com/s/files/1/0436/7374/7609/files/pokesimevajazudusog.pdf
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/1093724680.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/wokoditez.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052fe.bin
7fefc62815cdca99246eb19514b16a1fbd4df584415ed8658dee678f9117d897
pdf-font-stream PDF embedded font (sfnt) at offset 0x52FE 5348 bytes
font_01_sfnt_off00006539.bin
8fc2d0545edf141f3e68e60ea0fe02815a21739481b607ea0710e6aa2570f85d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6539 9968 bytes