Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff581fb365ed4c97…

MALICIOUS

PDF

46.2 KB Created: 2020-10-28 16:49:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 65738696b2c19a80f179e063105a2195 SHA-1: d6c3a5e3e3e2916c81137d7ef34a6fa644e36b24 SHA-256: ff581fb365ed4c97e33675a9fedb54a1b13948ed59013862a81807eaf0b12fcc
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically a URL containing 'auto repair manual online'. This suggests a phishing or scam attempt. The PDF also contains a large number of external links, indicating it may be part of a link farm or SEO spam campaign. No scripts were extracted, but the presence of embedded URLs and the malicious redirector link strongly indicate a phishing or redirection attack.

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://ttraff.cc/123?keyword=auto+repair+manual+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5f93d28cf25c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393018/normal_5f91f80e85d59.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/1/0434/7641/8713/files/jalotidorubow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7566/5565/files/88216941685.pdfIn PDF document text
    • https://s3.amazonaws.com/tagorarib/realidades_3_prueba_p-1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/difference_between_test_measurement_evaluation_and_assessment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1513/3605/files/76207313473.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/thalamus_and_hypothalamus.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/53052170324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8361/9232/files/31776882177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/0543/2751/files/tobezinakotew.pdfIn PDF document text
    • https://s3.amazonaws.com/fulomufimikim/51123627778.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/rawazevodutelaxamepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2478/7867/files/android_dynamic_radio_button_example.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/stories_behind_the_best-_loved_songs_of_christmas.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/fun_coordinate_plane_worksheets.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CB 3496 bytes
SHA-256: dc866eb8235c9f44f92164b0f8faa0de4744ed7cb2b02ec91fd4d4a15863fdd0
font_01_sfnt_off00007648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7648 4776 bytes
SHA-256: 164d72a16d4af28bcd8c1addc7ec2c06d87a6ce5889edba24893772eecb39c26
font_02_sfnt_off0000866c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866C 10348 bytes
SHA-256: 65365729bd01ca0a96cb432ced339cef1cdcab598b39c754dd5077fe8f1a513d

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