Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d3f15f92f8c7b69…

MALICIOUS

PDF

48.9 KB Created: 2020-08-06 09:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5392c61bde62028e0b7b1c5112223f0a SHA-1: c43873bc587038494fcbce742143b077c1e4b84b SHA-256: 6d3f15f92f8c7b691a8e34e143548a56ab6b9d530ec1e6f0fbb464a0e800414b
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.cc, which is disguised as a link to educational material. The PDF also contains a large number of links to external PDFs, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the embedded URLs are the primary indicators of compromise.

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.cc/pify?keyword=electronic+devices+and+circuits+multiple+choice+questions+with+answers+pdf
    • http://files.howtocookweirdly.com/uploads/1/3/0/7/130738603/2802834.pdf
    • http://files.johnnygoodmangolf.com/uploads/1/3/0/8/130874067/soxitekota_minumet_tidibujet_lipanota.pdf
    • http://files.knightgallerie.com/uploads/1/3/1/4/131437247/rusiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/36463758275.pdf
    • https://cdn.shopify.com/s/files/1/0428/5959/3894/files/kabasofenuduzalogipito.pdf
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/44112047434.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/62321356088.pdf
    • https://cdn.shopify.com/s/files/1/0430/8366/1461/files/tokopapo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/9853085564.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7741/files/14894265181.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/6804594145.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/6981/files/16036396408.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/29823806864.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/63996755060.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/wobenigaz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071f4.bin
14f39f6325f536910fd0c0f7595323b48eaa1b3134e7075737cc74c2fc1950b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F4 5512 bytes
font_01_sfnt_off00008495.bin
51ff7e43169981fdba44cba37c502c5413c890a887fd0c5dbd7d23b8a6b60e5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8495 10400 bytes
font_02_sfnt_off0000a7de.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7DE 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.