Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a11b4b9493f8fa7…

MALICIOUS

PDF

44.3 KB Created: 2020-08-11 00:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dcbc4a8c72bc72dc5ba705e514fdb5f SHA-1: d2d25f310c896f27dcce0bda31077b0de0584531 SHA-256: 7a11b4b9493f8fa7c2ff2753a6ab93ae9d90b881be8ca0c71a9988cb87c01e5d
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link redirects to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content. The document body, though heavily corrupted, contains a reference to the malicious URL, indicating its likely purpose is to drive traffic to that site.

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=ayurveda+books+in+telugu+pdf+download
    • http://benibovu.greenrabbitpress.com/uploads/1/3/0/8/130874493/8a99fae.pdf
    • http://files.intheblinkofaneyejewelry.com/uploads/1/3/1/8/131856079/289288.pdf
    • http://files.nicoleona.com/uploads/1/3/0/7/130739169/fe5710a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/22915576748.pdf
    • https://cdn.shopify.com/s/files/1/0428/9124/7779/files/binitere.pdf
    • https://cdn.shopify.com/s/files/1/0432/6909/5590/files/81343361272.pdf
    • https://cdn.shopify.com/s/files/1/0439/5555/2414/files/genetics_in_medicine_thompson.pdf
    • https://cdn.shopify.com/s/files/1/0447/8799/0688/files/35089103134.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/vawiliviveloxesetazig.pdf
    • https://cdn.shopify.com/s/files/1/0429/2204/9695/files/93234591060.pdf
    • https://cdn.shopify.com/s/files/1/0441/0173/0456/files/gababesaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/bivot.pdf
    • https://cdn.shopify.com/s/files/1/0430/4135/7977/files/texas_rental_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mazimuzoxoku.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/chief_keef_albums_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/history_of_ancient_egypt_free_download.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_off00006d8b.bin
5c314ab1b539aa5c412cb8413b8ee94c1f439ba0aaf4ae525fc629095db409f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8B 5656 bytes
font_01_sfnt_off000080fa.bin
c43cf46c9ef7267e61b53f7ed076e78ab8005b10e7afa0b67a4e368ced20aa26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80FA 10368 bytes

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