Malicious PDF — malware analysis report

Static analysis result for SHA-256 02cacfb9c3150cd2…

MALICIOUS

PDF

44.6 KB Created: 2020-10-27 13:25:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e964a083b4ce0bf20146e53368b0f63b SHA-1: 5e0fd89c4f2b77b53266c97e95db579dd256eb0c SHA-256: 02cacfb9c3150cd2f10d6fc001c32575d29328aaf8aab6ef8be5a4fec9edb965
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'bully geography answers' and the malicious URL, suggesting a lure to external content. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic.

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/123?keyword=bully+geography+1-5+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f874239cbfeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_5f96fca644ae4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f8b9de07f944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_5f93da6aad260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379602/normal_5f8b51c5315b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f897a422d364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5f8a94f9002ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5f8c37c31be4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f8c9adb31609.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/vidigil.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3532345.pdfIn PDF document text
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/8562427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405440/normal_5f925a4a1ac5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f87ae98541bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_5f97ec38b8e91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f874dd7375c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390661/normal_5f920e627665f.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/1/0430/6498/3703/files/download_flash_player_for_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0743/4142/files/sipurasuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5423/8369/files/spoken_english_tutorial_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/krups_savoy_coffee_maker_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0441/8458/files/92485477689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9359/7601/files/brookstone_wireless_speaker_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/desosaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5046/4945/files/wodosoxer.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_off00006ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA4 5532 bytes
SHA-256: fd4a7b5ec8638238a10f7670f776389acf9580ba9e6359c63aae4007844627ba
font_01_sfnt_off0000819f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819F 10344 bytes
SHA-256: f359cc7c55ca0f72a4e5728de41b3f04c594e18129140cb6b1bcd80f37582a6e

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