Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3716a748c015d6…

MALICIOUS

PDF

47.2 KB Created: 2020-08-22 00:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61a6d9aa11d39b7f0f3e404654221570 SHA-1: f6377dd329828a81bf6a4973f6ca83ce7eb328cb SHA-256: 6b3716a748c015d627693cfe2b35c8895565550e08abb20c70bc2f9c34c63bc6
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.ru, which is likely used to obscure the final malicious destination. The document body and heuristics indicate a lure related to 'bimmercode apk full', suggesting a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious intent, likely leading to further malware download or credential harvesting.

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=bimmercode+apk+full
    • http://files.veritasmissionfilms.com/uploads/1/3/1/4/131438202/1563810.pdf
    • http://zivegafip.longedgepress.com/uploads/1/3/0/7/130776021/732e5feb1.pdf
    • http://files.gceamsea.org/uploads/1/3/1/4/131407901/7e68f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6705/6029/files/java_certification_sample_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1289/files/vovuki.pdf
    • https://cdn.shopify.com/s/files/1/0444/0568/6438/files/pinexexijewukudunajogugi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6763/5867/files/nemozakafivozi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6934/0822/files/56710189996.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/58937730941.pdf
    • https://cdn.shopify.com/s/files/1/0452/8803/0370/files/maths_logical_reasoning_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pezudatilekubad.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/64331602193.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/76601320975.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005da6.bin
0219913373cf644cdda020aa1080559a34f2e36c5c86dfa9a2efba0c8ac58258		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA6 5236 bytes
font_01_sfnt_off00006f59.bin
3408d406c7d0fbd1a2e74412b92d1d16b338802f2203d75e4a4503c2afd3ac30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F59 13992 bytes
font_02_sfnt_off00009abb.bin
b91ebbfc40a94f10b2fcfc4d08542e4cd4fc38dcff43bcfefe5d572695fcce17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABB 16160 bytes

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