Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e19e1538259c0a…

MALICIOUS

PDF

43.6 KB Created: 2020-08-22 19:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31979023f20aec9c5bc07776fc33f3e1 SHA-1: 2a7c14c189cdf747fb06985777e27514d0320514 SHA-256: 41e19e1538259c0ab332fe99a20d80dbb75793494f063fd04579e7e14dfc1f8d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body suggests a lure related to a 'driver evaluation form template' to entice users to click the malicious link. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on Shopify, likely for SEO manipulation or to obscure the malicious 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.ru/pify?keyword=driver+evaluation+form+template
    • http://nidet.f4f-uncdf.org/uploads/1/3/1/6/131636612/7968677.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/79488546484.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/refaxerow.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/86127876609.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8428/files/kusaladilawuzenamax.pdf
    • https://cdn.shopify.com/s/files/1/0433/4089/0265/files/82876318198.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/domimoset.pdf
    • https://cdn.shopify.com/s/files/1/0438/1645/2258/files/mulobunuruxikalagugasiku.pdf
    • https://cdn.shopify.com/s/files/1/0440/1886/0190/files/56755019331.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/24556163902.pdf
    • https://cdn.shopify.com/s/files/1/0433/6277/9295/files/alexandre_dumas_los_tres_mosqueteros.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/97444102750.pdf
    • https://cdn.shopify.com/s/files/1/0430/5128/6690/files/quick_flip_questions_for_the_revised_bloom_s_taxonomy.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/96249933133.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/danabatini.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006084.bin
ed2827b8cb6ec6be2e58516ab23b7909cc771599be7c170084fff2cb7666a7be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6084 4812 bytes
font_01_sfnt_off000070cc.bin
10db095418d6fbfbf2c461321a683ad606c4ddc6a2adc135e0ba91a5a9a227e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70CC 9932 bytes
font_02_sfnt_off000092ca.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92CA 4324 bytes

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