Malicious PDF — malware analysis report

Static analysis result for SHA-256 5680a91a9e75e776…

MALICIOUS

PDF

82.7 KB Created: 2020-08-29 18:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4df163272cf4d1d98ae392852e9269e SHA-1: 11c8f1499e376ff2fc854678810e4c7b694b65da SHA-256: 5680a91a9e75e77652c1eee70e2dbc83d74763d6d0ff085927d8d25e046b8332
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Litigation checklist paralegal' and the malicious URL, suggesting a phishing or social engineering lure. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports a malicious intent.

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=litigation+checklist+paralegal
    • https://static.usrfiles.com/ugd/d9d1f5_ef6c618b531f408ea611e03f80882a7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a6e593227de4e2e8719c2da2bdf19a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0c90cec36e9447080397cc238479b82.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a63750ec0f04388874ce40097508cc2.pdf
    • https://static.usrfiles.com/ugd/93c935_a17381f6c2024920aa9e5c05d1ccb1b1.pdf
    • https://cdn.shopify.com/s/files/1/0459/8779/1015/files/risofo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/xomunenubewavejagonibol.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/mozed.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/mod_load_order_fallout_4.pdf
    • https://static.usrfiles.com/ugd/4d400c_8bcde3dc1d1f4e1f9ce14d90462281ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ae0dcf5291a4fcabc2834b713c7466a.pdf
    • https://static.usrfiles.com/ugd/b8c837_033bed34c16348498c0422b5935de5ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8aee9cf3d224da8ab4beb6219a02a37.pdf
    • https://cdn.shopify.com/s/files/1/0428/8629/9815/files/dukigolefigapaben.pdf
    • https://cdn.shopify.com/s/files/1/0450/0701/2004/files/81127223400.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/dumuga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97285982277.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f736.bin
0e96fdca8cc517e45a52075ab320b40681c3a225f764ae3d525ac590184e82aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF736 4988 bytes
font_01_sfnt_off0001081b.bin
cf647ce0419cd0584f41eef946b74ec05f385533fcdaa3eb562c84e2c85b5291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1081B 10992 bytes
font_02_sfnt_off00012d9c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9C 4324 bytes

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