Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1be6e569dd2aea0…

MALICIOUS

PDF

52.4 KB Created: 2020-08-12 14:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fa8e1a25eef4dc38a7f349e1377704f SHA-1: 034355bdc99129dcd4cff74e4d9eaff094e9d5da SHA-256: e1be6e569dd2aea055d5905b5f74578b799c43c68e3759f2e22db1db978a5486
152 Risk Score

Malware Insights

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

This PDF file contains a significant number of embedded links, many pointing to Shopify domains, forming a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=base64+decode+pdf+php'. The ML classifier strongly indicated maliciousness. The presence of numerous external links suggests an attempt to manipulate SEO or distribute further malicious content, potentially through the redirector.

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=base64+decode+pdf+php
    • http://files.erikhansenart.com/uploads/1/3/1/4/131454034/3309949.pdf
    • http://vafiwamo.tiadaghtonvalleyrr.com/uploads/1/3/0/9/130969724/1714531.pdf
    • http://kudeguba.saranyawellness.com/uploads/1/3/0/7/130775818/6853108.pdf
    • http://files.actioncomputerservice.com/uploads/1/3/1/4/131482931/fafuruxegagufa_lenokogazeraziw.pdf
    • http://sovib.drsleeper.com/uploads/1/3/0/7/130739625/75ce0e696404d58.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0108/files/bosutigegojopa.pdf
    • https://cdn.shopify.com/s/files/1/0447/4686/6839/files/unlimited_power_anthony_robbins_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/wakamasujokutajuwer.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/vezip.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/adobe_reader_for_windows_7_32_bit_filehippo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/las_50_sombras_de_grey.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/82548186924.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kesutuzijakakewinepubad.pdf
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/54973762476.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/18806224922.pdf
    • https://cdn.shopify.com/s/files/1/0429/7405/2503/files/minubugosekimebubod.pdf
    • https://cdn.shopify.com/s/files/1/0440/1774/6070/files/management_of_ameloblastoma.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_off0000809b.bin
4ffc382af9a07ea9e5c435bca7e4c51e658b0a7b337f550d843fb44ec0d0597d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809B 5404 bytes
font_01_sfnt_off000092f5.bin
8371b9ab28329ed6bfb3860e8a142e729c4e14b7de6d7ff7206f3e3a11f68cf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F5 15740 bytes

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