Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b896603db2ad8d…

MALICIOUS

PDF

66.5 KB Created: 2020-08-28 16:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4087390097b78c3d7ff5c8cc963ff6c SHA-1: 1d48e17946bc0abe26cd0a2f3c9910d025d0450e SHA-256: 07b896603db2ad8db7a6444763fdd9624439ada6796591b6bf94087b2c0567d8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to lure the user to a malicious site. The presence of numerous other PDF links, many pointing to benign Shopify domains, indicates a potential link farm or SEO manipulation tactic to obscure the malicious URL.

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=descartes+lettre+%25C3%25A0+elisabeth+6+octobre+1645 In PDF document text
    • http://files.heartofillinoisorff.org/uploads/1/3/1/3/131379371/9586210.pdfIn PDF document text
    • http://files.jessedinkelphotography.com/uploads/1/3/0/8/130873769/ca8b7cb2.pdfIn PDF document text
    • http://zelofozi.nicolajanephotography.com/uploads/1/3/0/8/130873995/8446188.pdfIn PDF document text
    • http://zelowowix.woman2womanweb.com/uploads/1/3/1/4/131437987/4783250.pdfIn PDF document text
    • http://files.largeblackhogofpa.com/uploads/1/3/2/6/132681028/c81104c37a1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/grief_therapy_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1294/8121/files/92745322292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5465/2822/files/vuxesakadikilajeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/bollywood_hd_movie_website_name_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2598/8757/files/vuvaralarokutozevaxuwuzis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9970/7805/files/saxeragam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2793/1034/files/27792457322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/wuxutosizeravobese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9581/7382/files/movies_counter_2018_bollywood.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/xoxeketosexofaxefuwomu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf84.bin
5e5157d94650d9911cff5b355c061b341f3ac19672d8dc9b773b4d0995191ab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF84 5680 bytes
font_01_sfnt_off0000d245.bin
39dfdc2de8a10a8154096774936294046a12388c867853d893d3115e650e5e03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD245 12812 bytes

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