Malicious PDF — malware analysis report

Static analysis result for SHA-256 17617b7e8759997b…

MALICIOUS

PDF

39.4 KB Created: 2020-10-29 01:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 199081a1196d6b996b8e5997f4aef810 SHA-1: 9ee79a01a69b8892d697f1f1b01128db7b2acf91 SHA-256: 17617b7e8759997ba99a7d2f4a3b75db641ad1efc12173190e534e3c892415ea
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to redirectors and link farms, indicating a phishing or malware distribution attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly suggest this. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score support the malicious classification.

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/123?keyword=young+living+panaway In PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/5123164.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/6842238.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/7303398.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/wituvejaji.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/dunijojivisilezuw.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/8201381.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/jovegoxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/bopijejitunizelor.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/tuximewojabedafojivarofi.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/blob_file_javascript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9582/5826/files/classifying_words_into_categories_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6214/7225/files/takeuchi_tb016_workshop_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7754/0251/files/rotadowukobogazafugapive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/xiritelezatujinugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4467/4979/files/terapia_intensiva_veterinaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0718/9407/files/android_textview_multiple_line_spacing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8598/0345/files/dell_xps_13_case_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/search_inside_yourself_ebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4632/4382/files/rimubuzozapoloduruxuvifus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6911/1448/files/42503475031.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_off000059cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59CB 4928 bytes
SHA-256: 64c9fe8dbe39ee79c67ba818a8870760271ff4ceeb4ea39e9825cfff5af501eb
font_01_sfnt_off00006acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACB 11516 bytes
SHA-256: 22c903d35850b24db21c0ab1258b98682f76a9db6c3836dc3378c343f0d5b809