Malicious PDF — malware analysis report

Static analysis result for SHA-256 22043dd72206c9b6…

MALICIOUS

PDF

42.5 KB Created: 2020-08-23 01:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ea2e7ead30392cad840f0de8544dcdd SHA-1: 14b36a838c5f5f5e5d73dd619239f66d140f8014 SHA-256: 22043dd72206c9b6bc7078fb6abbdc6b36efcbc5bab11f31593c8409fc9ecd46
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary link directing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=advantages+and+disadvantages+of+multilingualism+pdf'. This indicates a phishing or scam attempt designed to lead users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=advantages+and+disadvantages+of+multilingualism+pdf
    • http://files.daventrydogtrainingclub.com/uploads/1/3/0/8/130873973/6745225.pdf
    • http://files.sinkorswimapparel.com/uploads/1/3/0/7/130739646/1530685.pdf
    • http://files.communityresearchalliance.org/uploads/1/3/1/6/131608016/85d631f4a8.pdf
    • http://files.dos-beachwear.com/uploads/1/3/1/4/131454116/sibuvovulavidiwej.pdf
    • http://files.morleysstoves.com/uploads/1/3/1/4/131454523/7560057.pdf
    • https://cdn.shopify.com/s/files/1/0437/4183/9511/files/marguerite_duras_un_barrage_contre_le_pacifique.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/bloodshed_dev_c_5._11_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/1963/1765/files/22674924191.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4342/files/tufuwejutimivok.pdf
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/70605882884.pdf
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/90430177411.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/90352178449.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/jegagegob.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/ruwose.pdf
    • https://cdn.shopify.com/s/files/1/0433/3659/7654/files/lobowubuvudikuxiv.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_off0000681c.bin
ff4d88cccee8d4932a01d4593397aa726b5cc7d702425b1285587b574576fcac
pdf-font-stream PDF embedded font (sfnt) at offset 0x681C 5312 bytes
font_01_sfnt_off00007a2c.bin
094878a134bb3048cecf0cf0fcd480b1c04e85f130a291c42f042356c23f0fb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2C 10264 bytes