Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee508c52377f41b6…

MALICIOUS

PDF

48.2 KB Created: 2020-08-30 22:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f73f06df8df8cf74e3f565d2ed841ef2 SHA-1: 3fe24e05e80eb80dcca62a1ab6ff007663d36034 SHA-256: ee508c52377f41b6c8590f97e8070e33b18520e4d7d428faf8628d28965f7ae0
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a link to a known malicious redirector. It also exhibits characteristics of a PDF link farm, with numerous embedded links pointing to external resources, including one that leads to the identified malicious URL. The document body contains the malicious URL, suggesting it is a primary lure.

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=boss+monster+vs+boss+monster+2
    • https://cdn.shopify.com/s/files/1/0433/4629/6985/files/11670132707.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/93577716077.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6555/files/81740479541.pdf
    • https://cdn.shopify.com/s/files/1/0440/7109/2376/files/78276269039.pdf
    • https://cdn.shopify.com/s/files/1/0435/8252/1503/files/rejolomu.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f08fad810a54e01839bdafd1b2ee5ad.pdf
    • https://static.usrfiles.com/ugd/f55bec_f33715f00de045058f620c7d9c006cb9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/kabutasuretom.pdf
    • https://cdn.shopify.com/s/files/1/0452/4012/3552/files/descriptive_writing_samples.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_off00007f0f.bin
c9892b0fb3b967889fa513058fbde51e97644e8e0cb04458b4ec99fd343b6e5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0F 4972 bytes
font_01_sfnt_off00008fea.bin
a67763ddadc981ce1b593c8a7ac2872ec40ed304c9010eb58b375184e4321582		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEA 10496 bytes

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