Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1cca0cef6b98e09…

MALICIOUS

PDF

44.2 KB Created: 2020-10-27 16:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e819e850a3e1a4df2aa54fafec283a2a SHA-1: fc26fdd36f0694b0e9245cbc21088d2e6c64462d SHA-256: c1cca0cef6b98e09b7e58f16d5bdd6ec294fae287eb0a37eb8ccd68e8ce25372
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains URLs that appear to be part of a link farm designed to attract traffic. The primary malicious URL identified is https://ggtraff.ru/wb?keyword=nova%20escala%20de%20glasgow%202018%20pdf, which likely serves as a gateway to further malicious 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/wb?keyword=nova%20escala%20de%20glasgow%202018%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f8cc6f652800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_5f8a488a1633a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_5f97afa6a7a94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f877fdd01986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381539/normal_5f93edd06876f.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/kizovegok.pdfIn PDF document text
    • https://rurujopolobadez.weebly.com/uploads/1/3/4/4/134444805/lowamilipu-rajez-legapil-fofasoje.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.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/1/0480/5302/6975/files/86526784649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/skype_apk_download_for_laptop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2754/1409/files/graco_signature_series_jogging_stroller_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab1a62b4-ca56-4045-b968-8c346885f8d2/quality_assurance_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75371e68-0298-4041-923d-83590b0f2392/5234073975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd9ac116-6c42-466b-8f98-50c7cc079df2/16523965379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/077786f2-3a20-4d8d-b32f-689860a531ed/pojerotej.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/vivojaxuvogasukotupozab.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/sum_and_product_of_roots_of_cubic_equation.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/acgih_tlv_2016_espaol.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_off000068ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AC 5868 bytes
SHA-256: cb83987ae8c4be0cba0d34def508b16df37ae903eb648393555685c88a8ec45a
font_01_sfnt_off00007cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDE 11524 bytes
SHA-256: fd9e071cde764a599e1b25dd3d9e62a36f01ce26d37703d1bb1e51c134722f58

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