Malicious PDF — malware analysis report

Static analysis result for SHA-256 240a9b5b06328acb…

MALICIOUS

PDF

41.0 KB Created: 2020-10-01 23:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: d4f9320542be3c9c89396e8e804a4429 SHA-1: 9661ec2d65f0e1312368e43151cad50e0ccd5ca7 SHA-256: 240a9b5b06328acb1a8b76f1dc083f33b4871c57522ef5f1a9e09685bbc07a94
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ggtraff.ru/strik?keyword=mary+balogh+dogovor+pdf'. The document body, though heavily obfuscated, also contains this URL and other benign-looking Shopify links, suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

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://ggtraff.ru/strik?keyword=mary+balogh+dogovor+pdf In PDF document text
    • http://files.albertaaccesstojustice.com/uploads/1/3/0/7/130740249/10c36f13fc8.pdfIn PDF document text
    • http://vokoza.gettankedscuba.com/uploads/1/3/0/7/130776031/66035b981.pdfIn PDF document text
    • http://fijijike.lairginitiative.co.uk/uploads/1/3/1/0/131069839/cea25.pdfIn PDF document text
    • http://ropuxege.oneworld-wellness.com/uploads/1/3/2/3/132302782/xovanutowopesuriti.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/1/0434/0059/3557/files/35440438427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9680/2205/files/73286221807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0337/1935/files/37407713889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9517/3541/files/22513023050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/red_hot_dateline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/953f8df0-e450-4c1a-bb97-fefc6cc28639/siruwuvadikofutaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad79ed22-0c26-41d2-9f2e-0d6c9710b342/1116928235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ccb67ba-9364-4fd8-9377-2583beaa1cb4/kefififojup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97a79992-7967-4b84-ae45-3e126153fdb5/tefirusewof.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FD 5432 bytes
SHA-256: 585c633a58b3069abe9e1f2a5b69e58878be20ef4c6b444b1059587560c043bd
font_01_sfnt_off00007688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7688 9712 bytes
SHA-256: d400479d97c237c5985aadb32c0ed781688b4b7163bc33866d825d35691e223e

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