Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e5ccae943696e5…

MALICIOUS

PDF

44.9 KB Created: 2020-08-26 01:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26fd821c37753930998cb612a2572f79 SHA-1: 095a8af950e67c7bd980c37c834fe2671dfe1404 SHA-256: d6e5ccae943696e517d8fa1692b1833bf544e1b77feaffa70b52c5efd3f5d6d3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning attack designed to funnel users to malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body is heavily obfuscated.

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=spore+robot+chicken+adventures+download
    • http://lajipame.pacificallriskinsurancebrokers.com/uploads/1/3/1/4/131407995/6590561.pdf
    • http://files.thetrashtalkblog.com/uploads/1/3/1/3/131379820/4068510.pdf
    • http://fozaga.gildafk9.com/uploads/1/3/0/7/130738721/betolefawedinukome.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/mukasipesikomede.pdf
    • https://cdn.shopify.com/s/files/1/0432/6316/4580/files/girirunujitofu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/principles_of_analytical_methods.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7347/files/appositive_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/84500102809.pdf
    • https://cdn.shopify.com/s/files/1/0450/2441/1806/files/bhajanavali_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0432/0860/5859/files/kadogodu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8405/files/52198895834.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/57831712470.pdf
    • https://cdn.shopify.com/s/files/1/0451/0665/9493/files/78842315091.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/97648408033.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/gelawelovesugelosu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9789/files/44004181024.pdf
    • https://cdn.shopify.com/s/files/1/0439/4188/8155/files/lifigukuxajuwapup.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_off00006e23.bin
0245697407c27de865b0d4d55b04b4429bf4c4cb583bad7c2b6ae1cd97edd0b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E23 5620 bytes
font_01_sfnt_off00008140.bin
60b7e42074067158537a741db206347ae237ecde0de8df3bffbf7d7ba83ed8b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8140 10876 bytes