Malicious PDF — malware analysis report

Static analysis result for SHA-256 290dd0237a3ef147…

MALICIOUS

PDF

44.9 KB Created: 2020-09-29 23:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: df02b167209e9f0bfd8df933ab460043 SHA-1: c53765f150dc955bcb89c741e3883b23eaa2bff1 SHA-256: 290dd0237a3ef1478f5cc2347fadd379952ea2bdc3e05ad62c351c4330f0c66b
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://gettraff.ru/strik?keyword=sea+fishing+rigs+for+boat+pdf', suggesting a lure to a malicious site. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to a phishing or malware distribution 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://gettraff.ru/strik?keyword=sea+fishing+rigs+for+boat+pdf In PDF document text
    • http://xowuwu.jingyouecon.com/uploads/1/3/0/7/130740206/tujokuratedexu.pdfIn PDF document text
    • http://files.katiefrenchmarketing.com/uploads/1/3/1/1/131164297/5079748.pdfIn PDF document text
    • https://site-1037122.mozfiles.com/files/1037122/25316457531.pdfIn PDF document text
    • https://site-1036695.mozfiles.com/files/1036695/73199919745.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/nurepokejimokaviwazemase.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/1/0476/8812/2534/files/xosaferefezug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/marguerite_yourcenar_memoirs_of_hadrian.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2581/4936/files/little_misfortune_glitter_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/wiwimupokewiwimepez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8733/0464/files/39362703257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee2411e-512d-451e-9175-38ef324a6231/6794485992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54322f1d-e720-4a56-a898-c1695a7c3563/70578505953.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_off00007099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7099 5512 bytes
SHA-256: d90adb444d037df1bf5b6e3d91747463e56ba73e5b63deba88c7db6ddcb4094b
font_01_sfnt_off0000834c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834C 10556 bytes
SHA-256: f373743db3dcdb2a71a9b839ea280ab1c7870bf5bc09539819d31a10a00fc6a8

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