Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a407c4bdf3796e9…

MALICIOUS

PDF

56.6 KB Created: 2020-10-25 20:42:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a9affd98fa1ca64270cdb127ba6f75ba SHA-1: 44850732b0068fad7a64301acd9c23f5371ee769 SHA-256: 1a407c4bdf3796e9a5109c08941ff7610ece4dc4563d48cce87a2105a8bcb9f7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The primary malicious URL identified is 'https://cctraff.ru/123?keyword=green+manufacturing+processes+and+systems+pdf', which is flagged as a malicious redirector. The document body itself is heavily obfuscated but contains references to this malicious URL and other benign-looking Shopify links, likely to mask the malicious activity.

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://cctraff.ru/123?keyword=green+manufacturing+processes+and+systems+pdf In PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/3a1ab98813c.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/bb848522a1.pdfIn PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/vokodenomone.pdfIn PDF document text
    • https://xapinetevum.weebly.com/uploads/1/3/4/3/134330578/7c1cae788f59fbe.pdfIn PDF document text
    • https://jugubiwujivivej.weebly.com/uploads/1/3/4/3/134352954/02d0bc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f878d1c6d247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_5f8fe386159ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5f8bceef23b27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f8e755fbdb63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408866/normal_5f942e7d01ebf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f86fb4a5bdea.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/1/0501/9179/4355/files/what_bottles_fit_lansinoh_manual_breast_pump.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5345/4775/files/good_easy_guitar_tabs_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2815/1959/files/shazam_apk_premium_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9432/0304/files/kelero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeabb9a3-4163-4b23-bd6d-c6a411176924/jokoforafitigususatutizit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfd5fee4-781e-4c07-b3d8-b0f2f7db7395/bofikagufejaneresuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3758b9df-cf89-457b-a447-5e30f4f5caa6/pigifetemusigarabirajut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e7c0c1c-54c7-4a62-9d2e-0525d4cdfd0f/86807225417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5458/7295/files/bigilutosewevawaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2394/8183/files/fiselu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7887/9899/files/jiwigubalupivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0313/6168/files/derivative_classification_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0037/0602/files/get_your_guide_paris_versailles.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_off00009b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B21 5576 bytes
SHA-256: 6881179113b4d1158e5a607cb689bf48761b35dc22bd04c75b35521e91971bf5
font_01_sfnt_off0000ae0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0B 11704 bytes
SHA-256: 93da8615b440469b8d71f0b3a055ef8fc69d2f06212f157825ffa95f476603af

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