Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c3e4d37b31e759…

MALICIOUS

PDF

34.0 KB Created: 2020-08-04 07:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c98390e6586afb0ee26e78c641174d8 SHA-1: 8f299fd33a2f5a2ca1c2b6e3b9b7ea9703827f32 SHA-256: 39c3e4d37b31e75912d64633af16f2b09852e6a1c6a708045473fad15232cb8a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm designed to host SEO-optimized PDF documents. One prominent link, 'https://ttraff.ru/pify?keyword=research+methods+in+agricultural+economics+pdf', redirects to malicious infrastructure. This suggests a phishing or social engineering attack where the document is used to drive traffic to malicious sites, potentially for further exploitation or malware delivery.

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.ru/pify?keyword=research+methods+in+agricultural+economics+pdf
    • http://files.feelartmaster.com/uploads/1/3/2/7/132711961/bd326634a0b5.pdf
    • http://files.citataxpayers.org/uploads/1/3/1/4/131437308/nifexesevinamu.pdf
    • http://files.sin-temptation.com/uploads/1/3/2/6/132695354/dba485.pdf
    • http://dusukafo.ipuwaifarm.co.nz/uploads/1/3/1/4/131407668/zebunagik.pdf
    • http://files.kristawassenaar.com/uploads/1/3/1/0/131070144/tizowemerat.pdf
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/51183807740.pdf
    • https://cdn.shopify.com/s/files/1/0429/0497/7564/files/xizegulozelebotat.pdf
    • https://cdn.shopify.com/s/files/1/0429/6517/2387/files/third_law_of_thermodynamics_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3898/9718/files/zejid.pdf
    • https://cdn.shopify.com/s/files/1/0431/1167/8114/files/xuvebetimaxuzawifoki.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/kuwul.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/rukikobagutag.pdf
    • https://cdn.shopify.com/s/files/1/0436/3563/8425/files/woxezozokodosilog.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6991/files/mubigovalosubobivakawak.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/52449844368.pdf
    • https://cdn.shopify.com/s/files/1/0437/6212/2903/files/99245648917.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/92556852563.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_off00004745.bin
bb727a3c1ea4bd907bfbbf392eafb14181e62b14d8f9409aa8717f086a45cb98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4745 5576 bytes
font_01_sfnt_off00005a13.bin
0b3085d1667b4b9d85b2889b6235fffd32c380e9cb876aaf80afb42d5b582333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A13 9588 bytes

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