Malicious PDF — malware analysis report

Static analysis result for SHA-256 909055a38002a7b2…

MALICIOUS

PDF

47.3 KB Created: 2020-07-16 17:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: def6c9e41490f79b32ff056d320ce51e SHA-1: 84776b98195a5edabacfbf36a6059ffb7c828398 SHA-256: 909055a38002a7b27064ea4547babec92b7d1eb43c59ed40e79ee3c54ca621bb
172 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.com'. Additionally, it exhibits a PDF link farm, with numerous links pointing to various domains, suggesting a broad SEO poisoning or spamming campaign. The presence of PRC/3D content is noted but likely incidental to the malicious redirection. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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/wb?keyword=solar%20control%20and%20shading%20devices%20olgyay%20pdf
    • http://files.artbycyoung.com/uploads/1/3/0/7/130776308/tudarivubutosudi.pdf
    • http://files.gracehomeklang.org/uploads/1/3/1/4/131406999/meruxelul-wupisasoganuler-timewetifo-livumudaner.pdf
    • http://files.mobiledetailingpanamacity.com/uploads/1/3/1/4/131437044/rumemotutizuxa.pdf
    • http://files.gourmetboquetecoffee.com/uploads/1/3/0/8/130814133/a3488c.pdf
    • http://files.blue-eyedbuffalo.com/uploads/1/3/1/3/131398392/3244027.pdf
    • http://files.beckyhendrickfreeideas.com/uploads/1/3/0/7/130738620/pexijixobenazokela.pdf
    • http://files.ittakestworealestate.com.au/uploads/1/3/1/3/131378932/2668602.pdf
    • http://files.myeightcents.com/uploads/1/3/1/1/131164440/8795484.pdf
    • http://files.ri4d.com/uploads/1/3/0/7/130740357/fabara-fazuwilumeka-poxidixexora.pdf
    • https://zagezaf.files.wordpress.com/2020/06/84169401702.pdf
    • https://gugejakatag.files.wordpress.com/2020/07/losorigumevakumopavubivin.pdf
    • https://bidobexejin.files.wordpress.com/2020/07/20553213246.pdf
    • https://kurupava.files.wordpress.com/2020/06/88625749090.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/togovuragiken.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/17577986458.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2481/files/riruzafirinaligegetonixe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/wexuga.pdf
    • https://cdn.shopify.com/s/files/1/0428/3616/4774/files/68893751756.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/1897101221.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_off00007afb.bin
87c6e943f4e87399c32718a99793d5aeefc65d50a88e257fff21c35deeae3cd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFB 5472 bytes
font_01_sfnt_off00008d89.bin
ad6f8224ecfb7788f4f648692203ce2a13bb538281b90993ca34551537190157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D89 9808 bytes

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