Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b90935dce56ec66…

MALICIOUS

PDF

32.8 KB Created: 2020-08-11 13:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56a3b7d1ecc199a8d216fee5cfd9a25b SHA-1: 5bb0f47b115c52f28f0ea3c1dc102e6bd7ac07fd SHA-256: 5b90935dce56ec66377f4d93a4913f74270256351ef4199539a55f0038a6dcd5
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, directing users to `https://ttraff.com/pify?keyword=hydraulic+bearing+puller+project+report+pdf`. The document body also contains this URL and numerous other links, many of which point to PDF files hosted on Shopify and other domains, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=hydraulic+bearing+puller+project+report+pdf
    • http://files.impactdesign.co/uploads/1/3/1/1/131163634/kages-xolurumixen-zisuzoxa.pdf
    • http://rumad.churchofchristturlock.com/uploads/1/3/1/4/131407535/turujofizewulokasex.pdf
    • http://files.coloradowheatens.com/uploads/1/3/2/6/132681992/janag-jitajebizez-xewezolego.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3888/3495/files/daria_restoration_project.pdf
    • https://cdn.shopify.com/s/files/1/0433/7382/2102/files/bawip.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4027/files/palura.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/65341454724.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/demofemufexurus.pdf
    • https://cdn.shopify.com/s/files/1/0434/7048/7702/files/13269512902.pdf
    • https://cdn.shopify.com/s/files/1/0433/6258/2693/files/sozebugepabefokojoliwowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/busuzerevopuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/gatodusovexaramibatite.pdf
    • https://cdn.shopify.com/s/files/1/0431/2622/7093/files/pdf_to_word_converter_nitro_pro_9.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/97858935598.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000450c.bin
07508a9d6a3a8359ee17e13f7cd081877f8067d817aab21fae9b390dd482cdb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x450C 5424 bytes
font_01_sfnt_off00005788.bin
06d55402371c67abc027b18d6bc0d106fa67466a4e0ce91dce9c4e91cae4796a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5788 9024 bytes