Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d017da3584d394c…

MALICIOUS

PDF

35.2 KB Created: 2020-08-21 22:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f94f526af9f9cb4dd9718257551ef90d SHA-1: 713e337bcb7b809a67c4cebcb56805bd32795fa3 SHA-256: 1d017da3584d394c17440a3dc37362483985243024fd8115d5ece99a9bdc8148
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.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body contains obfuscated text and the malicious URL, suggesting an attempt to disguise the malicious intent while still providing a clickable link.

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.cc/pify?keyword=bachna+ae+haseeno+old+song++pagalworld
    • http://files.abdesignsshowclothing.com/uploads/1/3/1/6/131606343/d1d922f7a.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/accidente_isquemico_transitorio.pdf
    • https://cdn.shopify.com/s/files/1/0432/2040/2337/files/46614635992.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/47416345979.pdf
    • https://cdn.shopify.com/s/files/1/0438/0327/9517/files/44868553534.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/51265938469.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/career_guidance_after_10th_class.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/kril_tsuroth_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/59628707616.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/preschool_counting_worksheets_1-_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/59810576905.pdf
    • https://cdn.shopify.com/s/files/1/0448/4897/1938/files/jukonafidabewofipekejil.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/jokijajitifazuzogitilokit.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_off00004b49.bin
eb8450c2be14d4d2f149ebfb92b9c6f9b762e50b7664228dd17837dc610d2025
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B49 5476 bytes
font_01_sfnt_off00005deb.bin
964ea446fb2f6bc844c401b271d5021d7fcaf660481b582e4df51d027145d336
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEB 10012 bytes