Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da1ffd50f985b6c…

MALICIOUS

PDF

51.6 KB Created: 2020-10-27 18:02:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 85d0a49d0bdaf6e34ae463db211ccfce SHA-1: cbb87a95a4896461f6df2ee21b448931b78eb85e SHA-256: 4da1ffd50f985b6c1d50e9d29340dad43cc2d1b4b91293040495014230f885a3
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 pointing to external resources, which is indicative of a link farm or SEO spam. One prominent link, 'https://gettraff.ru/123?keyword=bed+and+breakfast+san+francisco', is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and the presence of numerous links suggest an attempt to redirect the user to malicious content, likely initiated by a user clicking on one of the embedded links.

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=bed+and+breakfast+san+francisco In PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/dacca0e215.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/tomaladeva_famesugopafixa_lapikeka.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/waxegof_vipowe_javidosekepod.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/rupipujonutapo.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/1/0497/2340/8545/files/48979485851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/46490461113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3124/7020/files/casio_beside_bem_506_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7069/6855/files/wuvezojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7519/9666/files/codependent_no_more_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/brazilian_blowout_smoothing_treatment_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0d558b3-9ea4-4935-96d1-e3589b68fa26/the_tattooist_of_auschwitz_audiobook_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3719e9d-ff8b-41cb-b507-0f09bbf17115/fakiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3009cf36-aded-4f2e-bd74-5fd0be1fc6ef/buraxobisizegug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d491a6b-a6bd-473e-a637-7b2eb153b81f/razuwidezujezotifow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2564/7784/files/nabigilodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8904/4651/files/64794530169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7047/9772/files/frankenstein_chapter_1-4_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/7318818782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9002b207-4821-43b0-8538-32648013b853/rubupemojidamirude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/406a9a07-0061-4d4f-ac3f-f8e78bcf1bbd/38265185605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38dc6319-e56f-43f5-b5e4-bf7a9c635279/pikidit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b87b1a-b3b8-4f33-be93-ca103d69bfd0/28320420637.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_off000087a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A5 5236 bytes
SHA-256: 1be84e520f03a941f53bc6b910851fd0a6e8eadad630e51e3bce7c381cc891a1
font_01_sfnt_off0000997f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x997F 11604 bytes
SHA-256: db04856ef0982c156fd27ffdcf16017d5f698e1b327e7f3720c860b50b058f4b

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