Malicious PDF — malware analysis report

Static analysis result for SHA-256 6796dafd53a4f053…

MALICIOUS

PDF

89.1 KB Created: 2020-08-26 09:40:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a42f52622c24b88f0e6f67bbaf031a5 SHA-1: cb1deef4a31b8b025f4b9457f24bda8683bdcff7 SHA-256: 6796dafd53a4f0534e4e2b9b87d3c10e1baaef2026ff42dd272a3305fd1c2887
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 likely used to obscure the final malicious destination. The document also hosts a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly indicate an attempt to lead the user to harmful content.

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=roguelike+adventures+and+dungeons+mi
    • http://files.namtokkitchen.com/uploads/1/3/1/3/131398246/4e8cbf2c30bf.pdf
    • http://files.marapillinger.com/uploads/1/3/1/4/131407369/kegodifev.pdf
    • http://files.dreamincolorllc.com/uploads/1/3/1/4/131438899/wixizebato_dafomuno_simisevona.pdf
    • http://sunoguje.mhfirstresponse.org/uploads/1/3/2/8/132814930/123f3f15a8589a5.pdf
    • http://files.wisedemocracy.org/uploads/1/3/2/3/132302894/a9f04f9f1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0444/7754/6663/files/ayyubid_dynasty.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/xutumuvutolijapiki.pdf
    • https://cdn.shopify.com/s/files/1/0433/5815/9006/files/wibazu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4485/files/wordly_wise_book_9_lesson_7.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/bupigunetewalenuruxexaje.pdf
    • https://cdn.shopify.com/s/files/1/0438/1281/5010/files/call_of_duty_mobile_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/12365562947.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/77636714446.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/rimazumarubobil.pdf
    • https://cdn.shopify.com/s/files/1/0434/3670/3900/files/the_incredible_hulk_torrents.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_off0000fb97.bin
b382029a04af8c5d5cabb0c485cde9654c8535d85aa6ee02633ff878b0f5c670		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB97 3592 bytes
font_01_sfnt_off0001084e.bin
60b465d01b0b463339c2a058cdda164f880f36bc3600865b986f0e15165670c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1084E 5276 bytes
font_02_sfnt_off00011a31.bin
25001b5299f9fab1198ea94655ebaf6c07185aea22ad3dac3deecb578faa7f34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A31 11160 bytes
font_03_sfnt_off0001403a.bin
3872e271c446214769d2c91b6f0b15ae860547e424e88ec81c2b248fc6e3c633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1403A 16400 bytes

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