Malicious PDF — malware analysis report

Static analysis result for SHA-256 689aa0307cb21918…

MALICIOUS

PDF

47.0 KB Created: 2020-08-23 21:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b6dd9b656957a21991a31b5c4fececd SHA-1: d0eaede2fa33fa0fe51ef7c9b387b22da45cc8c1 SHA-256: 689aa0307cb21918bb3a9cfac3a7c2b567ceb7e82e341f8cc87184dff4f4472c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting a lure for phishing or malware delivery. The ML classifier strongly indicates maliciousness, and the presence of numerous external links points to a link farm or SEO poisoning tactic.

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=transport+business+opportunities+in+south+africa+pdf
    • http://files.ludh-golf.co.uk/uploads/1/3/1/4/131454505/4523836.pdf
    • http://files.joanneschwehmbooks.com/uploads/1/3/1/6/131606490/ganobekaxafatar.pdf
    • http://nekezene.mtoliveameslidell.org/uploads/1/3/2/7/132712116/topagegofag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/53391897271.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/43216379771.pdf
    • https://cdn.shopify.com/s/files/1/0431/5748/7778/files/23379534277.pdf
    • https://cdn.shopify.com/s/files/1/0435/9526/8264/files/tugeruzavazutuzojebin.pdf
    • https://cdn.shopify.com/s/files/1/0438/0144/4512/files/feranenikubavafedafufuxel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/womonevixaxijebuvi.pdf
    • https://cdn.shopify.com/s/files/1/0448/0316/2263/files/gta_5_cheat_codes_for_pc_download.pdf
    • https://cdn.shopify.com/s/files/1/0443/9562/6662/files/jaxapisisawogererarunoru.pdf
    • https://cdn.shopify.com/s/files/1/0457/0808/3356/files/girl_lost_movie_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8590/5576/files/25362122618.pdf
    • https://cdn.shopify.com/s/files/1/0429/5668/5468/files/67138621997.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/rusufebi.pdf
    • https://cdn.shopify.com/s/files/1/0463/2690/7035/files/developing_countries_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/2039/3375/files/amway_products_catalogue_with_price.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_off00007862.bin
539d2be1b3e16251a7b197376881b322023cbdd182c7ed903385e40092b8588e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7862 5300 bytes
font_01_sfnt_off00008a51.bin
e7785af222f67f25b1a3fffd7e2f0d808761ba9e282f6f0f10404ae3b320e6bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A51 10496 bytes

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