Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13b11fb083da141…

MALICIOUS

PDF

44.6 KB Created: 2020-08-19 04:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0f62023cb8390c3a8929046ed2b630c SHA-1: 353a59fc647dce62b51551222d1e6a278ddb1d1c SHA-256: d13b11fb083da141abbdce46c0d90c10a51f7663222bb9f6a6ef2dd991f1d8b2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a link farm, embedding a large number of URLs, with one identified as a malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=school+uniforms+canada+pros+and+cons, which likely serves as a gateway to further malicious content. The document's structure and the presence of numerous links suggest an attempt to manipulate search engine results or lure users to potentially harmful websites.

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=school+uniforms+canada+pros+and+cons
    • http://files.sallybrownkatemorris.co.uk/uploads/1/3/2/6/132695200/gumupamu.pdf
    • http://files.outofthedarknessgriefsupport.com/uploads/1/3/1/3/131398449/152638.pdf
    • http://mofiv.kindredmassage.com/uploads/1/3/1/3/131380429/e445cb61696.pdf
    • http://jodozopew.jaalico.com/uploads/1/3/1/4/131454012/lovosu.pdf
    • http://files.michaeliskowitzart.com/uploads/1/3/0/8/130814066/mixevumuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/fundamentals_of_plasma_physics_bittencourt_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4130/0380/files/semud.pdf
    • https://cdn.shopify.com/s/files/1/0431/1554/4737/files/bowditch_rule_and_transit_rule.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/algebra_2_equations_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1042/files/50115292367.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/9723732738.pdf
    • https://cdn.shopify.com/s/files/1/0432/8164/5736/files/sonic_express_labler.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/13016907835.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/raduzuzepufojanuzabirimuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9921/0407/files/boselemo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8136/files/sogoruvatodiso.pdf
    • https://cdn.shopify.com/s/files/1/0436/5526/6457/files/articles_of_association_notes.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_off00006f43.bin
51e8310720477ca547d0b4d0e487191faaffbe7eedba9d6547cffbfb351ec0ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F43 5500 bytes
font_01_sfnt_off000081ba.bin
22e6f56fcdc54646034434d950567304be152e8f439ab6bec5c61348689ce3b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81BA 10372 bytes

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