Malicious PDF — malware analysis report

Static analysis result for SHA-256 5890e3724c936b53…

MALICIOUS

PDF

41.3 KB Created: 2020-09-01 12:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee32a1b58de788a5d8a742a53e89a8f9 SHA-1: c7cec15a89fc0c106ae56b84143f73ee031fac46 SHA-256: 5890e3724c936b53182e5c65e17ed95c6d63c05c47721a7a3f4908ec1a360eb6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, disguised with a keyword suggesting a movie download. The document body, though heavily obfuscated, contains the same lure text and the malicious URL. The presence of a link farm heuristic further indicates a malicious intent to drive traffic to potentially harmful sites. No scripts were extracted, but the primary attack vector is the malicious link.

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=bemisal+movie+mp4+song
    • https://static.usrfiles.com/ugd/3826db_070a987a889e4e6b8b5118756d3e3c36.pdf
    • https://static.usrfiles.com/ugd/b8c837_5972aac43e9e4125bbefbae86d13f219.pdf
    • https://static.usrfiles.com/ugd/b8c837_b22f59b59907468798f4fda32dbf3f5f.pdf
    • https://static.usrfiles.com/ugd/e4a001_6e9221da71784dd4be9d91f4d1fed6d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_97cce06393574f1ab9d5dc61c50d7bba.pdf
    • https://static.usrfiles.com/ugd/0049ca_86d45ffdda8f4de79f0d3e71c1f1cfab.pdf
    • https://static.usrfiles.com/ugd/74e905_3d383ef913da4bdbab82f093543c58d0.pdf
    • https://static.usrfiles.com/ugd/defcb2_77a649cb135741eebadf02e9432e3d31.pdf
    • https://cdn.shopify.com/s/files/1/0428/9301/7247/files/oxford_bookworms_series.pdf
    • https://cdn.shopify.com/s/files/1/0440/2656/0677/files/coastal_living_style_guide.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_off00006037.bin
3a114bf7850dd173dbfedec0ad556faabb595c047289c065ac99d9ff3d3378eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6037 5240 bytes
font_01_sfnt_off0000720d.bin
1bca49671e6fabd77f364d23e232b854faf35934d7f5bf298ae564ad1df4a143		 pdf-font-stream PDF embedded font (sfnt) at offset 0x720D 11740 bytes

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