Malicious PDF — malware analysis report

Static analysis result for SHA-256 58fa17cff6053336…

MALICIOUS

PDF

47.7 KB Created: 2020-07-27 17:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: fe9b580f1013b2a0999469c1ce906f69 SHA-1: deca3bfbef3b3e8abfea6581390be777d64f7e76 SHA-256: 58fa17cff6053336940901588f929a56c8ba7d21ae33cb593ae236bb86287ed9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to PDFs hosted on cdn.shopify.com. The document body, though heavily obfuscated, suggests a lure related to 'math worksheets'. The combination of these factors indicates a phishing attempt designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=math%20worksheets%20go%20solving%20quadratic%20equations%20by%20factoring In PDF document text
    • http://files.stcharlespilgrimages.com/uploads/1/3/2/6/132682329/tuwov_gibugenodisok.pdfIn PDF document text
    • http://files.abackrubco.com/uploads/1/3/1/3/131381540/3290d47cec4056e.pdfIn PDF document text
    • http://files.artandseekforkids.com/uploads/1/3/2/7/132710791/6521078.pdfIn PDF document text
    • http://files.bridgendrailwayclub.co.uk/uploads/1/3/2/8/132814427/78be89c76dad2.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/1/0434/0187/1512/files/medagizulelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/gagivadagogadimopemusasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/sepiluxipodifofupediwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2441/4882/files/rijigokogawumakizifesuxem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/guzikijelovezavazawokalel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/49866709229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8826/2821/files/41812074807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/57405169483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9257/3336/files/dapuwawijuzenulimefitoxor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/pulogesotebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/17389625304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5838/7349/files/luxunagimenakon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC5 5756 bytes
SHA-256: 7cb28ad17a6266c4076603b73c69b046a31a6d0b7692a753f137a8ba93ce62e0
font_01_sfnt_off00008e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E70 10256 bytes
SHA-256: 872fc84f09b9497e6c81d99fa915652e3306d14cc8823f6757eb2e93a63bffdf

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