Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6c9e991aca39f8…

MALICIOUS

PDF

45.3 KB Created: 2020-08-12 00:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b36cb3e08b8318be01c3d13c412c1c5b SHA-1: 219b10a9081f037912d9a8e5f89c0eb70f57e2ff SHA-256: 0d6c9e991aca39f8cd8b2d4734f60724a56b4a966de54d7e7637fef85b203817
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags the URL 'https://ttraff.ru/pify?keyword=bachelor+of+laws+unisa+pdf' as malicious. The 'PDF_SEO_LINK_FARM' heuristic indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact lure.

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=bachelor+of+laws+unisa+pdf In PDF document text
    • http://files.eco-full.com/uploads/1/3/1/3/131383977/nidegil.pdfIn PDF document text
    • http://fazigi.theauthenticitycoach.com/uploads/1/3/0/8/130814328/3541394.pdfIn PDF document text
    • http://files.polizzigenealogy.com/uploads/1/3/1/1/131164052/gujakut-tipodunulub-mugefigurevitiz-sativegiv.pdfIn PDF document text
    • http://zesulu.dreamworldphotography.net/uploads/1/3/1/3/131382406/6996673.pdfIn PDF document text
    • http://files.3djoes.com/uploads/1/3/1/6/131636725/mamebaramewe.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/1/0432/7391/2488/files/42696030244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1605/2126/files/nulobun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/dance_dance_revolution_xbox_one.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2866/5752/files/arrangement_of_elements_in_the_periodic_table.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/aplasia_medular_en_el_embarazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0099/3691/files/82753171715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/11388029799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9381/1619/files/gumupinoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4973/0727/files/honda_gcv160_oil_change.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3590/7480/files/zudagaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1608/5923/files/kinukemimivikoroni.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_off00007269.bin
291d7c5c6d2c4da3f5e71f65839753c56b7683f7ffbe5e4a911ab2b811860212		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7269 5384 bytes
font_01_sfnt_off000084c2.bin
6721247e83c5474536db26813f843a0e61be692cd5cd2bfa3fe5ce11390e3ce3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C2 10448 bytes

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