Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb2e872d87d4b97…

MALICIOUS

PDF

50.0 KB Created: 2020-09-04 02:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 97aa544e11a597d50c2aee17e2b4ee9d SHA-1: bc204074f9bc15c3bba0ad87a9f2d4cfdd800a19 SHA-256: dfb2e872d87d4b97846bec05e93afed2481234a367bb8584c43063df12993c68
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.club'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to benign Shopify URLs. The ML classifier strongly flagged this PDF as malicious. The presence of a download button lure further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=cheerleader+uniform+sims+4+cc In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/ableton_live_9_tutorial_portugues.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1887/8104/files/75172647642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/kifamanum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/escaped_alone_script.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6924eb_4d2170591cba489c89d1e484c3a6fe30.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7598fa_d82e7bba350543fd981a2b592908cecd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8b9728_2cc3f92fcd1c48eaaef751bebb52a220.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bbd3cf_0e9c0729dc214a229c39005a4c04c2f8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ac72e0_42ca66e26ff84b92b639af6b3ddc428c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fc840b_491b92f171e946f0b568fe2ac9b386f6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/de9003_79f4c328b5664c4eb8784a779038336c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8ab72e_6586171a0e2749f5a7079dd39cbbde0a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/22bf55_911e9220a9bc46c3b4e9ea8cc640b8c5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9d3e9abb2b6948a4a38ce6d4ba5f8abb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2f07a1_cb284ab58ab5446688cd46cf1176e028.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC7 5252 bytes
SHA-256: 302d3f272ad7caf520de53ee8649de7d60a9f650a23ebd162b4831fb7c2ece1e
font_01_sfnt_off00006c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C75 5180 bytes
SHA-256: 7b6067eb036794ed020926d13f3ac4f4e24be197f9c4950149427f80f8a26e00
font_02_sfnt_off00007b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B99 11080 bytes
SHA-256: 911c91e461b1ebcfdd8fdf25c07cb5c3966ce9fe53cd9d45b0a5977488165aa0
font_03_sfnt_off0000a16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA16A 16944 bytes
SHA-256: e8d153f3d75433f5a672836df963ae0f30ea10333021684b3bda80862977474d

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