Malicious PDF — malware analysis report

Static analysis result for SHA-256 452e79a18e792ed3…

MALICIOUS

PDF

41.2 KB Created: 2020-10-15 04:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 54d7f67480acfa963df19ecc5b8b28eb SHA-1: 6c6b400ab177fc0bb94e532d07aa8c996efacdb9 SHA-256: 452e79a18e792ed38e18e79b8d9750c2b4de630b2941eb1c598e336ec337b744
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to disposable hosting or redirector services. One prominent URL, 'https://ttraff.club/pify?keyword=chromecast+factory+reset+manually', is identified as a malicious redirector. The document's structure and content suggest it is designed to act as a link farm, likely to drive traffic to malicious sites or for SEO manipulation, rather than providing legitimate information.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ttraff.club/pify?keyword=chromecast+factory+reset+manually In PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/mejewewevalek.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wijigomofiweb_lotitosede_jukis_dirum.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/866f9c6956dfb96.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/4a1d66e1c0240.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/ea159dcf7d98.pdfIn PDF document text
    • https://site-1039421.mozfiles.com/files/1039421/pigikipep.pdfIn PDF document text
    • https://site-1043798.mozfiles.com/files/1043798/musedagotixusodugefefote.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/4c3bba1a-2ddf-47de-8ab7-97b540352e75/ranal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1c3999-46c4-4db5-963f-f24d1ce6a464/tilapagolefivopanofam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc71cd62-e505-4077-a425-aa1a1369bec4/jonofitavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ecc594c-6269-47de-9230-9b075fc3d378/48530790302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb7bc180-cd43-4773-a332-ab7ba62a19d9/nofirejivalizogowor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3694/1729/files/starting_strength_basic_barbell_training_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5795/5494/files/mexewutukazimelixuzawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4313/3352/files/paxawamizanaxetagagorot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0868/7769/files/north_harford_high_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8245/2644/files/change_root_password_chromebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2241/7561/files/bibipusobegisupimebaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0372/9304/files/likijumavedinop.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_off00006419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6419 5128 bytes
SHA-256: 20aaa6839d36368dd5cafa0978e69714c3800734e519daa91ef58777f10f1779
font_01_sfnt_off00007560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7560 10088 bytes
SHA-256: 647d4baf2b1cdd5aa37aa63c5530763700ee5e8ce2e2c04d6cfb58218e395074