Malicious PDF — malware analysis report

Static analysis result for SHA-256 7065a7fd2b5c12ea…

MALICIOUS

PDF

44.6 KB Created: 2020-10-27 02:24:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e6aa1efaf4fa72efd927f72fbe9da474 SHA-1: 4958d2b4922d658485ea320425293ce5dc494dd9 SHA-256: 7065a7fd2b5c12ea4bed90e62836602e41c083287db60add92d95910aac82178
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which is a known malicious redirector. The document body, though heavily obfuscated, contains the URL and a keyword suggesting a lure to a specific topic. The presence of numerous other PDF links indicates a potential link farm or SEO manipulation tactic. No scripts were extracted, but the malicious redirector URL is the primary indicator of compromise.

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.club/123?keyword=life+fitness+95ci+upright+bike In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f942aa979c7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f8b086721a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f873ea22f0f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f8c033eb34c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390641/normal_5f8e2891d4868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_5f8d55d0ef189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5f8b544a2b1ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5f89187164f58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f874cbe05b0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407301/normal_5f94612303769.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/aee79880-ba88-4ead-931b-e7466f8ace70/euro_truck_simulator_ifreleri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4cc63eb-deb9-435e-ab48-2df61242a2d7/soxonowawijin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a45620-c8d5-4273-8fab-0be28bc4672d/56528419039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7289/4629/files/92476335258.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/makalel.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/dafixepuretukigufep.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/67997225438.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/blood_type_o_diet_food_list_to_lose_weight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6841/5896/files/pharmaceutical_blister_packaging.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0122/3589/files/59367305241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2751/1496/files/23417018038.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_off00006dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEE 5460 bytes
SHA-256: 66788179e3bc6e5e1afc81c1ae39285a0d3fef737abffdfa5921d47a01464105
font_01_sfnt_off0000807a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807A 10560 bytes
SHA-256: 7cc9e4895c895610981fd07b67ee00222a2dc110e289f03c4f92ae5a0257d4a8

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