Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ba92c6a3d6f67c…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 07:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f89f79265d2b3d32c9741f59deddfa1 SHA-1: 471294a5790e6dc193047c46cc3640fdee3df161 SHA-256: 56ba92c6a3d6f67cf174448fffac5373b68f3a53023e40feb9668eb40386754e
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One of these links, https://ttraff.com/wix?keyword=midland+weather+radio+instructions, points to a known malicious redirector. The presence of a link farm suggests an attempt to obscure the final malicious destination or to generate traffic for SEO manipulation, ultimately aiming to lure users to harmful content.

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=midland+weather+radio+instructions
    • https://static.usrfiles.com/ugd/9d869b_ee14e8cd41e64d97acfe2e0e2b810e47.pdf
    • https://static.usrfiles.com/ugd/36f25b_a89ed53f8c104c55b31948b4f57eda43.pdf
    • https://static.usrfiles.com/ugd/a382ee_18e0647457294700807cd1891ed08a05.pdf
    • https://static.usrfiles.com/ugd/3eed2b_2430a9197802469d9cec670ca9f58768.pdf
    • https://static.usrfiles.com/ugd/b8c837_d08bd93ebae74a728af5cc5ece301b5f.pdf
    • https://static.usrfiles.com/ugd/b4609a_8920d145b049475ca977bc598e891aa5.pdf
    • https://static.usrfiles.com/ugd/07ef24_419a2cca556945598f1398b17090dbd2.pdf
    • https://static.usrfiles.com/ugd/b8c837_7153104b2f4e4ed4bfcd29b37267f57e.pdf
    • https://static.usrfiles.com/ugd/b8c837_6da2dc5df60c4aa28a00aed2239a116b.pdf
    • https://static.usrfiles.com/ugd/3eed2b_f1a75a75ca364ee691729ac845da7956.pdf
    • https://static.usrfiles.com/ugd/a298ce_7af45449a07a4ca2aa2c9a4333871673.pdf
    • https://static.usrfiles.com/ugd/d5d855_4d084bb70bac478391fb8a51f999bb6a.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/psychology_of_interior_design.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/john_deere_sabre_parts.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_off000064c1.bin
888ae6edd0aff730f698ca33a3247c3bd00be6c9b3b3fe74e51cee0cad5c0348
pdf-font-stream PDF embedded font (sfnt) at offset 0x64C1 5124 bytes
font_01_sfnt_off00007637.bin
9e533772510e50e42aad08c8cd1936bc817070e2bf2bbf7e64ce476a38893181
pdf-font-stream PDF embedded font (sfnt) at offset 0x7637 12240 bytes