Malicious PDF — malware analysis report

Static analysis result for SHA-256 08497f07940cdf5e…

MALICIOUS

PDF

42.6 KB Created: 2020-08-05 18:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89f5d203ea3c9c3db09add1ae5a6a3f6 SHA-1: 3f46b1d1dd937c5d4e7a7e00c3a474629941ea7d SHA-256: 08497f07940cdf5e22ebced36e4b34d5aa50f104d80207c41c86f702d3ac420f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=chuy%25E1%25BB%2583n+file+pdf+sang+h%25C3%25ACnh+%25E1%25BA%25A3nh'. This suggests the document is part of an SEO poisoning or content manipulation scheme designed to lead users to malicious sites.

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=chuy%25E1%25BB%2583n+file+pdf+sang+h%25C3%25ACnh+%25E1%25BA%25A3nh
    • http://files.alldonemarketing.com/uploads/1/3/0/7/130775221/3822325.pdf
    • http://files.scarlethistoricalreview.org/uploads/1/3/1/6/131637163/1087964.pdf
    • http://files.acdelre.com/uploads/1/3/1/3/131379706/gimeruwer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/lalexabejoxabiwu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/schma_rgional_d_amnagement_du_territoire_maroc.pdf
    • https://cdn.shopify.com/s/files/1/0438/4132/3170/files/anesthesiologist_s_manual_of_surgical_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/north_carolina_notary_public_manual_2016.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3355/files/96352486097.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0919/files/voxuwefituwos.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/bamarogusoxodatogejok.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/6668045889.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0471/files/75481474240.pdf
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/71819665450.pdf
    • https://cdn.shopify.com/s/files/1/0430/3683/5993/files/principles_of_catholic_social_teaching.pdf
    • https://cdn.shopify.com/s/files/1/0428/7817/3343/files/ligaretepav.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/xovudulokinixikunijizize.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000647e.bin
d5db20adda4570916ace225028c0bfe12385b4958347caccf417c18dc17eecd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647E 5740 bytes
font_01_sfnt_off00007747.bin
34682e01266973dd1362432167ba681879aa6bc92a04038a17628ce34e1d9812		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7747 11092 bytes

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