Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbdd0b39aff56a13…

MALICIOUS

PDF

40.2 KB Created: 2020-08-29 23:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0f0e3e0dc5c34c2090a1e32c9eb6368 SHA-1: 01c54f61572c012ac67549671720eb95a87a4ced SHA-256: fbdd0b39aff56a13bb27dd16b32c4f7fb8868685db91d965fd4c2f565537315d
152 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, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that appears to be a lure for game downloads. The PDF also hosts a large number of external links, many pointing to 'static.usrfiles.com', suggesting a link farm or redirection strategy. The primary malicious URL is 'https://ttraff.com/wix?keyword=pokemon+glazed+download+gba+ios'.

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=pokemon+glazed+download+gba+ios
    • https://static.usrfiles.com/ugd/b8c837_d0a240b999dd4962a9aaa97d70bbd310.pdf
    • https://static.usrfiles.com/ugd/b8c837_99c0c71b95044af3ad1db1c9017334a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee79441fcde94d45a23488ab8aedfa4d.pdf
    • https://static.usrfiles.com/ugd/b8c837_765b813be39641e098dfb3974e2d5643.pdf
    • https://static.usrfiles.com/ugd/b8c837_99a05ef4693a485eabdb5b46b23183fa.pdf
    • https://static.usrfiles.com/ugd/e2c250_ad9af8a4ceeb4ff2b09553e19de41373.pdf
    • https://static.usrfiles.com/ugd/5be868_66808984d69446b58fd710dae276bff2.pdf
    • https://static.usrfiles.com/ugd/b8c837_1353e6e07bad48c5b2d358914f14a1f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_30af63356c804a899a100402006bec80.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2c2396210724176abdfc9fe94180e7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_8800f48600f345069d2bbca9e13aedf9.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5965/files/13950596009.pdf
    • https://cdn.shopify.com/s/files/1/0430/5246/6325/files/27227120937.pdf
    • https://cdn.shopify.com/s/files/1/0462/8506/2304/files/android_oyun_club_hitman_go.pdf
    • https://cdn.shopify.com/s/files/1/0438/2782/2752/files/ramemim.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_off00005f83.bin
876e933773e061d3a7c2aa4be8635b3393f1bbc437eaeeb0091e6150743d496f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F83 5396 bytes
font_01_sfnt_off000071e4.bin
7b36aee89faaf4a12038c45f7c7b21a10d303554761e467da33b66d6d88f5e52
pdf-font-stream PDF embedded font (sfnt) at offset 0x71E4 10024 bytes