Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d8af5ecdedeb294…

MALICIOUS

PDF

42.3 KB Created: 2020-08-10 00:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51a8a40a1cc6267c3e449ea7793c8089 SHA-1: 7c1d51bf4e0ebbb51d7344663d1435d4436996cb SHA-256: 9d8af5ecdedeb2948965c787e7a0269b49177fdb513dbc83c2b7d3dd1f9375bd
120 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=astm+a53+standard+pdf', indicating a lure to a malicious site. The presence of a large number of external links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to drive traffic to malicious destinations.

Heuristics 3

  • 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.
  • 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=astm+a53+standard+pdf
    • http://files.mygosolartoday.com/uploads/1/3/0/7/130739316/ganosixagufunem-fafot.pdf
    • http://wupimupo.interacthhs.com/uploads/1/3/2/6/132681556/bajazorixobipivol.pdf
    • http://files.arlingtonmsband.com/uploads/1/3/1/6/131606087/ddee7.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2690/files/69163851249.pdf
    • https://cdn.shopify.com/s/files/1/0436/1424/0931/files/breast_cancer_screening_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/types_of_advertising_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8333/files/12765763189.pdf
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/mindfulness_activities_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/rubeke.pdf
    • https://cdn.shopify.com/s/files/1/0435/2799/5552/files/bozado.pdf
    • https://cdn.shopify.com/s/files/1/0428/3292/0732/files/sotomewerisumilisuwun.pdf
    • https://cdn.shopify.com/s/files/1/0435/8465/1423/files/sefaxalatiginem.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0645/files/16626997340.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/dna_to_mrna.pdf
    • https://cdn.shopify.com/s/files/1/0433/6258/2693/files/74283148140.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/2722542434.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_off000066b9.bin
12e4433a856f7adce3fd96b9062117909d9f316e35eb3f0f2953c2af57efa5ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B9 5432 bytes
font_01_sfnt_off0000791c.bin
1a261272de57407f563e669850ebaa24bf1f083c3ff9f89c9c216706b3c849e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791C 10316 bytes

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