Malicious PDF — malware analysis report

Static analysis result for SHA-256 cacee9172517454c…

MALICIOUS

PDF

42.6 KB Created: 2020-10-15 06:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9192656c38e00c8b405a07de037c0c0c SHA-1: 69e0d721fa7739b0d0352ee006091fcccd7ba323 SHA-256: cacee9172517454ca4fa3adf2df30c67cb7fbb7411fdae5afcef4f87ade0c61a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'pdf to word converter premium apk'. The presence of a link farm and a critical heuristic firing for malicious redirector links strongly indicates an attempt to redirect users to malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=pdf+to+word+converter+premium+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f871605a76ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369143/normal_5f87bfd288654.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f877fc2b6cc7.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/1/0496/6295/1581/files/raluxuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9103/7859/files/wotabugol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/sofozokemigiludop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a3a2e2-61fd-46c8-b1b2-7f88ee83ebe1/47029458893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69848707-5d9a-40c8-bc10-46021a80af6a/xigefoxumowetexix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd917a6-e1b6-43b5-9802-90b61fe3778b/20700110297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8098/8310/files/juegos_de_educacion_fisica_para_preescolar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/ravaxavudomurunavemeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9249/5521/files/flojos_flip_flops_fiesta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1938/5502/files/88877981155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94fe55e0-6bf3-4063-85fa-baf06f55264a/43020651762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f7fbe6f-0eb7-435d-b49f-b418dc2f5ba9/bikodiditukuwaparewateg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eaa7992-6064-4803-af12-58a889fb863b/93813419554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9030/0068/files/meals_on_wheels_houston_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3624/4118/files/the_bad_seed_book_william_march.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5692/1256/files/ions_and_subatomic_particles_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3171/3694/files/74342403387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5213/7622/files/canoeing_merit_badge_worksheet.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_off00006869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6869 5308 bytes
SHA-256: 25b44ec95f866396016ec0251305e9435bbfe91edba7dd8dd32f3bc2355a8c5c
font_01_sfnt_off00007a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7B 10088 bytes
SHA-256: 6477523eac2817fb2e4bda0c87b1bebdb8c1c9ea87d2b987cf5ed558892158ae

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