Malicious PDF — malware analysis report

Static analysis result for SHA-256 6afc84c232df1f07…

MALICIOUS

PDF

36.6 KB Created: 2020-08-30 04:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b2f306c2e77b72e34cccb9e1f36f138 SHA-1: 5c695e4d5793549399774aa7312122304074bf53 SHA-256: 6afc84c232df1f075de72bf9377dece045940147dd473e6559062fb6a852ea72
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, masquerading as sheet music, that point to a redirector URL. The primary malicious link, https://ttraff.com/wix?keyword=broken+vessels+violin+sheet+music+pdf, is designed to lead users to potentially harmful content. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content.

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=broken+vessels+violin+sheet+music+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/mizirozobujovojabinada.pdf
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/the_curious_researcher_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/5609/4614/files/xumozewulojaduwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8334/9657/files/types_of_lipids.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/juwujojawidaxitufifusuro.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/nogotififokusaba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.pdf
    • https://cdn.shopify.com/s/files/1/0434/4555/1256/files/2011_vw_tiguan_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevimofurerofujasopam.pdf
    • https://cdn.shopify.com/s/files/1/0433/5455/4533/files/31889849017.pdf
    • https://cdn.shopify.com/s/files/1/0432/6791/5936/files/kinododokosiweduzefap.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/mebikifudalabivelamakisup.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/dukizimizob.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/sulibuno.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_off00004f5e.bin
785bedd3da709346768c04da4c5282f4b02f57a990a32bd1989af9edaae41924
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5E 5356 bytes
font_01_sfnt_off00006175.bin
2eb3a8557243540d017299385a36ac9add08ff47b332560fb253ba912b15fc7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6175 10592 bytes