Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd54f64692a32a4…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 03:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23f89d264c069526a33362e38fa90e2d SHA-1: 2b5e335b5930a6e95d1552edc1bb8c41abab33c2 SHA-256: 7bd54f64692a32a48c163baed614d09034e204734a2fac8075e3cfec2996db94
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is associated with a keyword search for 'model creator minecraft download pc'. This suggests a phishing or social engineering attempt to trick users into visiting a malicious site. The file also exhibits characteristics of a PDF link farm, with numerous links to Shopify-hosted PDFs, likely for SEO manipulation to improve search engine ranking for malicious lures. No scripts were extracted, but the presence of the malicious redirector is a strong indicator of malicious intent.

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/wix?keyword=model+creator+minecraft+download+pc
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/77518955657.pdf
    • https://cdn.shopify.com/s/files/1/0447/0875/7660/files/action_verbs_worksheets_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4334/files/mekejomotad.pdf
    • https://cdn.shopify.com/s/files/1/0437/1424/8857/files/rotisifalajikenidu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4546/9858/files/probability_distribution_binomial_poisson_and_normal.pdf
    • https://cdn.shopify.com/s/files/1/0431/8711/0037/files/26904906024.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonuxifipepi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/zelifofalexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5502/1206/files/46172397430.pdf
    • https://cdn.shopify.com/s/files/1/0451/2792/5925/files/elefant_carti.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/mibanedasaferomaji.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/narcissus_greek_mythology_story.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6919/files/muzezesi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6613/8522/files/riniwinerisokomuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1463/files/rca_rlded5078a_d.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_off00006173.bin
bcbab3e2864f429625baa065822ffcf402a4c8809c57686c590c375378d2ba79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6173 5220 bytes
font_01_sfnt_off00007337.bin
b9b04e77aa9d6ded30d52eda88891a3396b5ec80b698718b0edf79ed32f2f2dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7337 10420 bytes

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