Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ef52305089785c…

MALICIOUS

PDF

43.4 KB Created: 2020-08-12 06:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2432b21f1c9f8141fc42fad2ec2720c SHA-1: 39d4c3e7c7d3ffcd565d0ed3ec6ad6fdcc9af85d SHA-256: 56ef52305089785cb4f7583702230b933cf8eec37207571fcf85cb5d4a842e72
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious URL, disguised as a document download. The document body and embedded link annotations also contain numerous links to external PDF files, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier 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=self+recommendation+letter+sample+pdf
    • http://files.kyokushinkaratewodonga.com/uploads/1/3/1/3/131381555/talimoroxovogapubo.pdf
    • http://files.adrianaabbate.com/uploads/1/3/0/8/130873717/pozuzevusitev.pdf
    • http://files.monikasteinhoff.com/uploads/1/3/1/0/131069950/807580c.pdf
    • http://rutexoviw.thymeandplaceshop.com/uploads/1/3/1/3/131380429/xabofuz-tefuditujotufo-dimom.pdf
    • http://files.bethejourneytravel.com/uploads/1/3/0/9/130969498/7364612.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/calvary_chapel_distinctives.pdf
    • https://cdn.shopify.com/s/files/1/0434/8218/5893/files/zaxugomifala.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/laboratory_glassware_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/famujofaviwaxif.pdf
    • https://cdn.shopify.com/s/files/1/0434/3939/0872/files/introductory_statistics_weiss.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/najuni.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/68162017382.pdf
    • https://cdn.shopify.com/s/files/1/0434/7111/0310/files/capital_boitempo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/vofuno.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/3gp_to_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/78238450654.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/lavefajomegepebizez.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/50266954268.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/lofatamikidotiridon.pdf
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/msi_battery_calibration.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_off00006bae.bin
6be7f02a0951711f1eeedb89f5028d55b029c8ac4ee53edd143c7a0aa43268e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAE 5404 bytes
font_01_sfnt_off00007de6.bin
b69cd672dbe0d82b619597854060aac4b00da65ad047ccee48df27cacdcbe695		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE6 9976 bytes

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