Malicious PDF — malware analysis report

Static analysis result for SHA-256 606e790393bd3ef6…

MALICIOUS

PDF

40.8 KB Created: 2020-08-12 10:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c55ae164920123d89a499de95e2d3bcd SHA-1: 8933eaf4ff218e044ca44bf6ed082889ddb21254 SHA-256: 606e790393bd3ef691ed437bb7e34b8120e7c4051ed29fbe729ccef93ab3684d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Ada 2020 diabetes pdf español' and the URL https://ttraff.ru/pify?keyword=ada+2020+diabetes+pdf+espa%25C3%25B1ol, suggesting a lure to a malicious site. The presence of many Shopify links, some benign and some unknown, indicates a link farm strategy. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=ada+2020+diabetes+pdf+espa%25C3%25B1ol
    • http://samimas.slaterfamilylaw.com/uploads/1/3/1/3/131380213/kuvozefikekokonegul.pdf
    • http://files.abbyfeiner.com/uploads/1/3/1/1/131164076/7020238.pdf
    • http://files.dashpac.com/uploads/1/3/1/4/131411539/8652636.pdf
    • http://files.cookiesthenmilk.com/uploads/1/3/0/7/130776757/f9d1d9583f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/bevikakikobiwugaxixiveko.pdf
    • https://cdn.shopify.com/s/files/1/0437/3518/7605/files/96819115041.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/best_python_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/beginner_headway_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/5419/5097/files/ranogunuba.pdf
    • https://cdn.shopify.com/s/files/1/0438/2919/9005/files/53423636150.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7350/files/fabigaxawobajaxaweg.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/45497829035.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/avant_garde_art.pdf
    • https://cdn.shopify.com/s/files/1/0437/9492/3677/files/tujofitawagasinumelevogaf.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_off00005f1b.bin
2e44ef9910c9c42822e8eb82b271303034c2e27536d93c75ddd408599f231297		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1B 5556 bytes
font_01_sfnt_off000071c4.bin
29f10650ba2bb664575dc0d5ebcc36e9ac7122a405e6653058a7b84f8cd83659		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C4 10656 bytes

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