Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d89868979c435f…

MALICIOUS

PDF

39.8 KB Created: 2020-08-29 03:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17218d819892f44d6a0672dc29f2b4a8 SHA-1: a6a3a9a3700a035d5d35b1ccdb15824406303d61 SHA-256: 82d89868979c435fcd962818341c7ca1c01d456b8e48677a72437e40edcbfdf9
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.ru. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, many hosted on cdn.shopify.com. The document body, though partially corrupted, contains text related to 'John deere bagger installation instructions' and the PDF generation tool 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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.ru/wix?keyword=john+deere+bagger+installation+instructions
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/gepoxefaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7715/files/anemia_ferropenica_en_adolescentes_embarazadas.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/batman_dark_knight_rises_ringtone_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/belt_guide_sewing_machine_definition.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8cb6a49217443a2bd38dc59a5914f8a.pdf
    • https://static.usrfiles.com/ugd/b8c837_92d2526c93cb496e9193eaea4a828be4.pdf
    • https://static.usrfiles.com/ugd/b8c837_56497b6f60fd4daaa8b54dae692f1a87.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca6aca370f124b1b9c1597a557f422a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_108fc8ab29a64a10a410ea0c5d2b291a.pdf
    • https://cdn.shopify.com/s/files/1/0431/6682/6656/files/64670635961.pdf
    • https://cdn.shopify.com/s/files/1/0428/6201/8727/files/80868793516.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70474217151.pdf
    • https://cdn.shopify.com/s/files/1/0437/4950/7223/files/63004906424.pdf
    • https://cdn.shopify.com/s/files/1/0454/2873/6168/files/76388570885.pdf
    • https://cdn.shopify.com/s/files/1/0433/5111/3887/files/westworld_movie_480p.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14192803693.pdf
    • https://cdn.shopify.com/s/files/1/0428/9481/9484/files/wijopuwexerira.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/elephant_foot_yam_cultivation.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_off00005d70.bin
9ea48a0cf7dd9d0b63bda07ff6a91312aedb58a0767672cc1178c9e03b356609		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D70 5328 bytes
font_01_sfnt_off00006f81.bin
c089fb7c754b004ae05fa9aa871174da84bf07d47ae7bbe802c254936e6edb89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F81 10140 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.