Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f85f17b7dad099…

MALICIOUS

PDF

59.0 KB Created: 2020-09-01 01:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f121a20b25096a12c81cc9927b44e65f SHA-1: db6e559e50cfcf7b2d624e3e5c0e4e50e3eb8691 SHA-256: 95f85f17b7dad09999cf9f390891298c0c78839671142c101cf927e06fb3c11a
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify and static.usrfiles.com. The primary malicious link is likely intended to redirect users to a harmful site, possibly for phishing or malware delivery.

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=fight+club+movie++in+isaimini
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/xibusosixapigimemego.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/ruin_john_gwynne_epub.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/pediatric_cardiovascular_examination.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_050fbd722e524d7d89725239b22fdf96.pdf
    • https://static.usrfiles.com/ugd/26938b_a3ece06dc6484cc28f4cea14fe5b7c88.pdf
    • https://static.usrfiles.com/ugd/3649d2_063813f2a2434ad7a9c003db6a587566.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1774ddf6d114eb98cce210ceae72023.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3d1e5b9c4dc424298829ba826c98630.pdf
    • https://static.usrfiles.com/ugd/d55797_79fcae23ecb648b4836c5700e7064d10.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7688/files/52052634007.pdf
    • https://cdn.shopify.com/s/files/1/0429/7631/3503/files/kanigi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009785.bin
6b9ef97ce64b919633cfa195db0d4be5e72580fb2cb37ed2e6ac5ff95930cb07
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9785 12264 bytes
font_00_sfnt_off00007ae5.bin
6c307ba60cadde95073699babde7790cc691d89e3e1f94789bbada93b75d2ca3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE5 3012 bytes
font_01_sfnt_off000085aa.bin
b98c25265f733bd6e3951e5f6c4a808516c90848a28e27889967276143d10f1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x85AA 5272 bytes
font_03_sfnt_off0000b733.bin
f0ed220c4eb98f38fd72d52a96980c8c92ca36e5a2288624fcdf765079945899
pdf-font-stream PDF embedded font (sfnt) at offset 0xB733 12228 bytes