Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d14bd8c1e41ab7c…

MALICIOUS

PDF

51.7 KB Created: 2020-08-17 04:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3cda1e3b604e4bf7727f9c79a4a6ce1 SHA-1: fa73dcc91c6c9bf57adde53524a62d7b5fc229bf SHA-256: 7d14bd8c1e41ab7c838fc53c4520fb7486777a4f0e66aa0c89c8aea9df0d0589
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://ttraff.ru/pify?keyword=europa+universalis+4+guide+steam', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, indicating an attempt to drive traffic to malicious infrastructure under the guise of providing game-related content.

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=europa+universalis+4+guide+steam
    • http://fowari.elevateyourself.org/uploads/1/3/1/6/131606345/fipadipon.pdf
    • http://nojoxuke.a2b2club.org/uploads/1/3/1/3/131383297/8719184.pdf
    • http://files.behaviouralparenting.com/uploads/1/3/0/8/130813111/a29e6.pdf
    • http://datikajop.eaistech.com/uploads/1/3/1/3/131383483/2999544.pdf
    • http://files.gavrielrosenfeld.com/uploads/1/3/0/7/130775436/zurasavufe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3371/4070/files/bitowezubew.pdf
    • https://cdn.shopify.com/s/files/1/0438/5076/0357/files/marketing_project_for_bba.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1513/files/linasefir.pdf
    • https://cdn.shopify.com/s/files/1/0441/3492/4440/files/tuketabapasunefix.pdf
    • https://cdn.shopify.com/s/files/1/0432/0300/2523/files/92866323876.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/poxuxikimusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7453/5067/files/put_first_things_first_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/5731/3957/files/bomb_calorimeter_problems.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6904/files/44872879077.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_off00008ca1.bin
10149f144770b38b304b50824ed22bba511bd829fb5214fad941b33fda98ca76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA1 5384 bytes
font_01_sfnt_off00009eee.bin
de9bacd6b94516d377cb84b465700caa552cc364ee171386fb0185d9de52ca5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EEE 10264 bytes

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