Malicious PDF — malware analysis report

Static analysis result for SHA-256 0695a5fe8c0f3373…

MALICIOUS

PDF

48.5 KB Created: 2020-10-28 13:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 53df36b5a87c6d4fca0e95fdd8e43aa4 SHA-1: 10a104d04de16ee07a056df66147aa09349f11af SHA-256: 0695a5fe8c0f3373c46c9097d5671f4a4bbd28760e781cc6db0dccecffb1e32d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One prominent URL, 'https://ggtraff.ru/123?keyword=ben+10+generator+rex+heroes+united+download', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains this same malicious URL, reinforcing the intent to redirect users to potentially harmful content.

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://ggtraff.ru/123?keyword=ben+10+generator+rex+heroes+united+download In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3464/1052/files/12459299262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7530/3592/files/paper_floor_lamp_lowes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0887/4423/files/running_curse_of_strahd_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/29764521891.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/rekifaleto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ef43fb-b6f4-4532-8b8d-e4762d2e2402/pomedazadidoxamuzetu.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/vejaxojupimudobaxomefux.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/generative_adversarial_networks_projects_kailash_ahirwar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5709/3045/files/jilokifekasamaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0840/7745/files/medical_fitness_certificate_for_sports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5bea315-e6c3-4812-b271-1da6111eeb46/kifiguxu.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/badutusunixokukarob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6310/7480/files/9th_grade_english_reading_comprehension_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/antibiotic_sensitivity_test_in_microbiology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a84143fa-39cb-4ede-9dd9-f9c273c5f0a7/xiduwitulatalofogaxumun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbbd932e-bed3-4898-83e4-0506582559ab/pros_and_cons_of_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/makalah_abortus_inkomplit.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/25451500559.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/1_goal_free_education_for_all.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4de21351-8814-4fc2-9ada-c3bfb697956b/abnormal_psychology_kring_13th_edition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C43 5372 bytes
SHA-256: 6abdc330f86346c69a648137a939ac8a6e941c5d1dad54d6abd5a1367cb90f74
font_01_sfnt_off00007e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E95 11476 bytes
SHA-256: 3b38752617c939becc6d64f7a3dab94e4ff0530729bd450ec0888981dfdec72c
font_02_sfnt_off0000a4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4DC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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