Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b88c842a841c3c…

MALICIOUS

PDF

47.2 KB Created: 2020-08-06 12:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f64abb5b364d91672c526ca61b1b3003 SHA-1: 66a2614b0e0a96147a49f0cb9208901c45f8516f SHA-256: 94b88c842a841c3c4e1dc365cb0f0dd889bc99257508da99209b154b083e53f4
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/pify?keyword=budget+2020+trinidad+pdf In PDF document text
    • http://lopugux.inspiredayurveda.com/uploads/1/3/1/6/131606407/6802873.pdfIn PDF document text
    • http://files.genathomas.com/uploads/1/3/2/6/132681985/b2bdc818256d.pdfIn PDF document text
    • http://files.throuthelens.com/uploads/1/3/0/8/130874122/bipawe-bukivina-penugug.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/1/0430/6314/8695/files/mogax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3631/0678/files/52135616853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/62960690032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4356/0346/files/gikujomaxoxireru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51098187394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/90994932643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mofofuledezenededur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/zunuvigaragizazakom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/opie_heart_physiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/60549931373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/7309/8143/files/complex_problem_solving_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2602/9463/files/didodak.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_off00006cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB2 5324 bytes
SHA-256: cbf84c7a5e1ce5799f322d757bd1972544eabdddab06a5cf30522ab13eacbd2c
font_01_sfnt_off00007ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE5 15328 bytes
SHA-256: fd8eb2a3c0e4d219dcd1e79da6ac22a0f5187c2548e97f53256e3008a4c57b11

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