Malicious PDF — malware analysis report

Static analysis result for SHA-256 70effec7bc6fb1b3…

MALICIOUS

PDF

42.1 KB Created: 2020-10-31 21:22:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7b535cfe881e199185d9fbe9d1847e98 SHA-1: a9889373974ba132c4058ef86ec3cc57900a8116 SHA-256: 70effec7bc6fb1b3801765b43c308c70072ff01438c9322e6fb8447707b5a8dc
194 Risk Score

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.me/123?keyword=panio+lady+nancy In PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/7249761.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/0be9af9d99.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/1535740.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/4109476.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/9181155.pdfIn PDF document text
    • https://bagexefegaluja.weebly.com/uploads/1/3/4/3/134393574/ffd59cd5.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/wekibik/javojipotilixofawixavo.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/cr2032_battery_dollar_tree.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9921/2964/files/toy_scale_size_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6781/3287/files/lanikenep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5636/1379/files/51458060271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5140/0391/files/water_resource_management_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7364/1379/files/neoplasia_endocrina_multipla_tipo_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8608/4772/files/le_sicle_dor_espagnol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/4531/9333/files/amazfit_bip_lite_manuale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9261/6372/files/how_to_tie_a_reef_knot_instructions.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_off0000685c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x685C 4760 bytes
SHA-256: 9c1466e405705ae972828d80ec1d9ca621097c710d2922baa9ef5a96a3dbc7cb
font_01_sfnt_off000078ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AB 10348 bytes
SHA-256: 65eae8af477fd4d2b66dd0467c91f86a6edaa74064b6f08d51d3a667933b2759

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