Malicious PDF — malware analysis report

Static analysis result for SHA-256 157014150671bcd8…

MALICIOUS

PDF

49.7 KB Created: 2020-09-06 10:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1c501ad34e33ba5e2dd2d1ca431a273 SHA-1: f86037780177bf25a95d376f4e69197ad70cde10 SHA-256: 157014150671bcd8a7db31bc63c25b9dfca6a4c3cca649b63301f8c3d6e89232
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for movie downloads, suggesting a phishing or malware distribution attempt. The presence of many external PDF links, some pointing to benign content, indicates a link farm strategy to obscure the malicious redirector.

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.club/wix?keyword=angadi+theru+movie++in+tamilyogi
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/6820/9817/files/architectural_lighting_designing_with_light_and_space.pdf
    • https://cdn.shopify.com/s/files/1/0428/8705/3475/files/rukofewuvesiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/kugipolenaduma.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/776383287.pdf
    • https://cdn.shopify.com/s/files/1/0437/5642/1269/files/duck_dynasty_full_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2819/files/50170532898.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78491346320.pdf
    • https://cdn.shopify.com/s/files/1/0434/6635/8934/files/autodesk_revit_architecture_student.pdf
    • https://static.usrfiles.com/ugd/c81504_b6aa9a9b2f334e86968695be9dfbff7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_9aa87b3a407b411b992e3fae46b32f23.pdf
    • https://static.usrfiles.com/ugd/ad8f3a_baec11158ae748159f8322c8d4095210.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006176.bin
2fb05b9b7382086e8fc1a1012cd08cdce7b93eff84ee2819d96d25c6fa755516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6176 5096 bytes
font_01_sfnt_off0000729c.bin
addd1b415a67a1434a9c2859e1fe224ff12aee7bdef2e3709e70963d854148b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729C 10292 bytes
font_02_sfnt_off0000960b.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x960B 16164 bytes
font_03_sfnt_off0000ab22.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB22 4324 bytes

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