Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f7e932ff69fdbb5…

MALICIOUS

PDF

45.5 KB Created: 2020-08-11 06:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07f700b1182c3a8131e2fabaef51f744 SHA-1: 6621ac61814aac905f3d1b6a50731bfe081250fd SHA-256: 8f7e932ff69fdbb5f0c99802deaf38defb69038b505de42c0928cf0022aa605b
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding a large number of external links. One of these links, 'https://ttraff.cc/pify?keyword=absceso+cutaneo+furunculo+pdf', is identified as a malicious redirector. The presence of numerous links, many pointing to Shopify domains, suggests an attempt to distribute malicious content or conduct phishing by overwhelming the user with options or appearing as a legitimate file repository. 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.cc/pify?keyword=absceso+cutaneo+furunculo+pdf
    • http://files.laidprettyboutique.com/uploads/1/3/0/9/130969855/nizavunowite_wefura_xozujut_goxijaxov.pdf
    • http://rifuf.kayaksissy.com/uploads/1/3/0/8/130873822/sedizufiminezu-lobajemububav.pdf
    • http://files.hancockmusiclessons.com/uploads/1/3/1/0/131070861/5617631.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/27330481908.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4843/files/freeman_biological_science_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1125/files/aberrant_mind_sorcerer.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/55804473303.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/55480324235.pdf
    • https://cdn.shopify.com/s/files/1/0435/9805/3535/files/19433682324.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/joromokibovoxebavina.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/wodilaxoweb.pdf
    • https://cdn.shopify.com/s/files/1/0438/7792/5019/files/33953679933.pdf
    • https://cdn.shopify.com/s/files/1/0439/1773/8152/files/83981881673.pdf
    • https://cdn.shopify.com/s/files/1/0427/7554/3964/files/fagabuvamoxab.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/nozutanezukakaroji.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/medical_aspects_of_chemical_and_biological_warfare.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/
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000737e.bin
4f6ad23760d6b22dfb288e76a7d08053a7d09ec76fcae07e5a09a91b44b7c1bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737E 5276 bytes
font_01_sfnt_off00008567.bin
33f21cc688a8b3783288f30f0bdc0fca8fae18e4be1f17c5392d04fe938ac320		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8567 10436 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.