Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43c855dc57997be…

MALICIOUS

PDF

51.8 KB Created: 2020-08-05 00:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea82ab4a21ace1f592b25d5608e46aa2 SHA-1: 6cd910589b8e2185e937fd7281878b7190622b61 SHA-256: e43c855dc57997beaeb77d3a7fe7c8ab8e033c47f703cf828c5923a9a2e2a7a3
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=sickle+cell+disease+book+pdf'. The document body also contains this URL and numerous other links to PDFs hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The primary malicious URL is likely used to redirect the user to a phishing or malware distribution site.

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=sickle+cell+disease+book+pdf
    • http://files.thevideodomain.com/uploads/1/3/1/1/131164054/nezoj.pdf
    • http://files.bluenosewoodworks.com/uploads/1/3/2/8/132815961/somokirolurujewikusi.pdf
    • http://files.allcoverbookdesigns.com/uploads/1/3/2/8/132814958/setesojezexaxorowexa.pdf
    • http://files.allamericanclassicalballet.com/uploads/1/3/1/4/131438829/wanodilur_gibaxodomutik.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/10131581183.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0314/files/jubisubuseseparuzeni.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/applied_psychology_in_human_resource_management_cascio.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/mejafajigekoro.pdf
    • https://cdn.shopify.com/s/files/1/0434/8333/2772/files/exercise_physiology_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/visaboxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6256/files/sigeliwom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdf
    • https://cdn.shopify.com/s/files/1/0435/4415/0165/files/boss_rc_300_manuale_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/dipudunatasowibev.pdf
    • https://cdn.shopify.com/s/files/1/0440/9108/0869/files/lotinipag.pdf
    • https://cdn.shopify.com/s/files/1/0429/9620/3679/files/62964718369.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45560821546.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_off00008cef.bin
fe1ca953a417e29c3c50e56a2a36f0fccc823c0ed81d9263296b9e27856df02e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEF 5360 bytes
font_01_sfnt_off00009f3a.bin
062819d9f9764a1da9528bbf566e8c15dc6fd407c5c085e7a37b1fba49e26159		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F3A 10296 bytes

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