Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaabe413914cccb6…

MALICIOUS

PDF

47.9 KB Created: 2020-08-23 00:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ef40295e21943c1568a426278d3c8fc SHA-1: d81635641112213feb749e5994dafbdae1b41598 SHA-256: eaabe413914cccb64201368eaa5c05d941498a464f21fac22ee20fc6bd78e79e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `ttraff.cc`. This link is presented within the document body, disguised as a datasheet for a 'Fluke 376 fc'. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on `cdn.shopify.com`. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing attempts.

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=fluke+376+fc+datasheet
    • http://gapul.felipevis.com/uploads/1/3/0/7/130738524/a5c3ef74f80dfc.pdf
    • http://files.wherelindagoes.nl/uploads/1/3/0/7/130775518/sepepa.pdf
    • http://levaf.definitivearts.net/uploads/1/3/2/6/132680981/fezujijuziwaxuz-jidajepisarira-fawij-xowitamenako.pdf
    • http://vumorafew.stalbansdavenport.net/uploads/1/3/1/4/131437502/xiganatibezoxi-fagena-jogabudif-zegojum.pdf
    • http://files.clintonbracesmd.com/uploads/1/3/1/4/131410747/9460585.pdf
    • https://cdn.shopify.com/s/files/1/0435/1619/9066/files/biostatistics_and_epidemiology.pdf
    • https://cdn.shopify.com/s/files/1/0433/4089/0265/files/sheet_metal_embossing_machine.pdf
    • https://cdn.shopify.com/s/files/1/0430/1894/4665/files/luzepujujanozajagu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/vumur.pdf
    • https://cdn.shopify.com/s/files/1/0445/7899/6383/files/biodegradable_food_packaging_materials.pdf
    • https://cdn.shopify.com/s/files/1/0431/4592/0669/files/cdse_notification_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/2029/6090/files/metemakodafizi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/gekonilafuzajejuxikefo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/dolixoti.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/35034980678.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/1/0445/7899/6383/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007747.bin
98152ebf410a17f1755fa7e722fca07832525a9779fb3843f4dde1822b587241		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7747 5428 bytes
font_01_sfnt_off000089c0.bin
e770e8d1c1d0c7a8eeff386de1f98b46e58e032cd5ceef970ab1f99f6a3e86da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89C0 11952 bytes

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