Malicious PDF — malware analysis report

Static analysis result for SHA-256 8099fba3ae707fe7…

MALICIOUS

PDF

44.1 KB Created: 2020-07-24 17:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b7b844aa18efb9c7615de2f0086a3e9 SHA-1: 2f012f23d28e3a5df9628a31a71800cd8bc9fce2 SHA-256: 8099fba3ae707fe7a871c5436ee7b5ca19bd871c75f30b9d95808fc7a5b8dae1
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a PDF link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=spotify+playlist+to+apple+music', which likely serves as a gateway to further malicious content. The ML classifier strongly supports the malicious verdict.

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=spotify+playlist+to+apple+music
    • http://files.margotbittenbenderprints.com/uploads/1/3/0/8/130874691/mezozimil.pdf
    • http://files.bbsimon.com/uploads/1/3/2/6/132682570/tudijimavu.pdf
    • http://files.sukhi.no/uploads/1/3/0/8/130874563/3776955.pdf
    • http://files.theblondeabroad.org/uploads/1/3/0/7/130776276/3a78d790ea4fffa.pdf
    • http://files.hottopicstalkradio.com/uploads/1/3/0/9/130970005/kalorumopimora.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3920/3229/files/betomukukezatikenubopanor.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/18591437649.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/judilonogar.pdf
    • https://cdn.shopify.com/s/files/1/0437/6579/2929/files/23792626845.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/8801411707.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9756/files/59184871905.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/gadivawerowovake.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/86880643126.pdf
    • https://cdn.shopify.com/s/files/1/0432/3131/4077/files/80361317290.pdf
    • https://cdn.shopify.com/s/files/1/0428/9013/3663/files/29102576795.pdf
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/13074230433.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96617946950.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_off00006eb5.bin
06a37dd27e17add4d57e718382f2317e68c53b96a9ce7269a18a8f4ab7838c96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB5 5048 bytes
font_01_sfnt_off00007ff2.bin
86a70498ce3a009675c762acd58df9b3f43bf9fc2515e5b58b16ded9b0297876		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF2 10392 bytes

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