Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8aaa25bd6553a21…

MALICIOUS

PDF

44.1 KB Created: 2020-10-29 08:25:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d112d9075d78a087bb5c683f6635a914 SHA-1: e9fad9bd0ef604b8764b42725d01a475142500b9 SHA-256: a8aaa25bd6553a21e080f35cd6ca417cc2b30a0fcef56bbb3032869a1974a841
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, suggesting an attempt to drive traffic to malicious infrastructure. The document body, though corrupted, contains keywords related to a health cleanse, likely used as a lure. The presence of numerous external PDF links indicates a potential SEO spam campaign or a phishing attempt disguised as legitimate 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://cctraff.ru/123?keyword=shakeology+3+day+cleanse+side+effects In PDF document text
    • https://zuragani.weebly.com/uploads/1/3/1/4/131438510/novusudoxis.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/mipizuzazarof_zadonuburi.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/ba5f132c-e9ee-4238-ba17-d74d6b3d8cf5/39817150845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/7863223676.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/40k_codex_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be6e876a-0e38-47e7-80b9-379d976523aa/9254028184.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/white_water_summer_1987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2599/7217/files/dendroid_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/bizhub_350_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc104c15-d871-4dd6-b771-d4be6c63443d/41856344907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82a2602a-e0ec-41b5-826c-039867972f81/71383703301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0659/8557/files/operant_conditioning_in_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc04db4-aba1-4fcb-a85e-e221fd30ad6d/11640806775.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/mergers_and_acquisitions_basics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/271a4dc4-bbe6-4995-8ce5-a0808cb7f50e/46697061280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7759/4005/files/empirical_research_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a1f6d3-1287-476f-b106-4c9650657c5d/masa_molar_de_un_compuesto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5932/9177/files/drawer_example_in_android_studio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3092/8279/files/free_steam_key_no_survey.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/zambian_biology_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/9438/1989/files/xuxas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9732c9b-d281-47fc-ba17-b80c0472a02b/zisulemejosogatukopuno.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_off00006cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF9 5620 bytes
SHA-256: ba5dbe73ecd2881666c921b3c3ca6ac7ec281a90b7a1bccad4e7f9ce2663b92e
font_01_sfnt_off00008026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8026 10096 bytes
SHA-256: f6be6a3ca6a66675d620f18073e45ec310ebf65814879edd930e1fe6b2d26be5

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