Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa2065354115ae1…

MALICIOUS

PDF

39.7 KB Created: 2020-08-31 23:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c902f5e1c71dd020c43bc7aa97f68205 SHA-1: 2b64d64a118ede91e3bbbc2592fd14f5b882334c SHA-256: 4fa2065354115ae18f68ee7f9c6f1dc3b04f74d6c77a555b8f313a2c049ba08e
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=stremio+addons+apk', suggesting a lure related to software addons. The primary function appears to be directing users to potentially harmful external sites through a link farm strategy.

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.com/wix?keyword=stremio+addons+apk
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/39186819077.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/vupunodubosaxerekijufo.pdf
    • https://cdn.shopify.com/s/files/1/0462/5652/1367/files/tobudolununilog.pdf
    • https://cdn.shopify.com/s/files/1/0438/9067/1771/files/illinois_drivers_license_written_test_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/dosep.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/jikugomabukig.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/31380827227.pdf
    • https://static.usrfiles.com/ugd/ecec20_4ca06743b38c4432afd1ffa8ea714270.pdf
    • https://static.usrfiles.com/ugd/3e5d97_131e7ea88be54b7cbcfd3ee5728a1196.pdf
    • https://static.usrfiles.com/ugd/b8c837_82215c7f92a84d68842c521fdb60dc0b.pdf
    • https://cdn.shopify.com/s/files/1/0435/3923/4967/files/70460692192.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3829/files/fipiwebirimokezapanigoto.pdf
    • https://cdn.shopify.com/s/files/1/0428/9160/8227/files/zibawiwi.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_off00005d3e.bin
98381c724fd2395cecfd319490e49627d46065f71c9583e656ad7271427ddeda
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3E 5240 bytes
font_01_sfnt_off00006ef7.bin
41f9c4b97cc64a809688a93f1b171ac0289be05d567175be2aa24652e907830d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF7 10388 bytes