Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb04dd8a49aa11c…

MALICIOUS

PDF

43.6 KB Created: 2020-10-29 06:31:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d99b876134dcf20fb06edf8c85d799d7 SHA-1: e30c9701c68d2225ce290e3ee8f358e1ad267bc0 SHA-256: 7cb04dd8a49aa11c7da9fc34f1e81b71f8b9cd2c199dc23e4ed112f9392330a3
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links to external PDFs, a technique often used for SEO manipulation or to redirect users to malicious content. One of the embedded URLs, 'https://gettraff.ru/strik?keyword=ps2+hdmi+converter+review', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness.

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=ps2+hdmi+converter+review In PDF document text
    • https://defelewag.weebly.com/uploads/1/3/2/7/132741475/70acebdd85a.pdfIn PDF document text
    • https://weniwekozeg.weebly.com/uploads/1/3/4/0/134012595/4852597.pdfIn PDF document text
    • https://digulowewuw.weebly.com/uploads/1/3/4/3/134363346/7059294.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/21e0c5f32f7a2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377125/normal_5f90b576dccc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5f8b7b6f5b551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5f89c3476291d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/604073df-066b-41ac-bc1f-569b89fe999e/tanidonujijuwod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1690/files/assessment_center_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/8872/4127/files/vilorasudemumoxizado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/nexegopumixoxajevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7661/4819/files/idexx_canine_pancreatic_lipase_test_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1742/4024/files/11234046718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86eb17e1-3117-4985-9a1d-db1f0311c5fa/kiresolusuvesigid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9327/7854/files/6202771955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4689/4758/files/4th_anniversary_gift_etsy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81be2d24-1abe-4ef4-943f-18935cb67c95/roblox_sunglasses_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1155/3473/files/xuloja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/les_couleurs_en_espagnol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7060/9312/files/nursings_social_policy_statement_the_essence_of_the_profession_ebook.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_off00006ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE5 5220 bytes
SHA-256: be228ce60bc3b21cc9bf83412efa1521d391cf9854041d76b0a8cc45f4e28b43
font_01_sfnt_off00007e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E96 10184 bytes
SHA-256: f477e7076c28c1be386f20f3607600b4850bd2f65a1ca58c33f279f6ce7e06a6

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