Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b343434176f095…

MALICIOUS

PDF

51.3 KB Created: 2020-10-28 00:36:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 60765624bea589ceb99694c0e2c6f548 SHA-1: d35a0cb567c76c3e781507fdecdc3ad31140f168 SHA-256: c1b343434176f09574f268b984a0809e791545f7986467a6ded7534d9805d2d7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ggtraff.ru/strik?keyword=air+force+air+gun+ammo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_5f912526b790c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f91e4150c92e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415055/normal_5f96b5cc3bb41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379974/normal_5f9549928d81b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f8d2fb7c6a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416934/normal_5f98a0b7777ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5f8c081ededc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5f966e2564fe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f871760c1434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5f9439257e55c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/todoveve.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/translation_rotation_reflection_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/ascending_order_and_descending_order_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/8815394934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8630/2369/files/wopesipalutirijosurafiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6612/1623/files/equivalent_ratios_worksheet_6th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7561/5902/files/94514357803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1926/2363/files/91046150362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8392/6171/files/fuwuxanejotuwegolinizigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0377/1547/files/aapke_dil_mein_jaane_ka_rasta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5757/2761/files/2497639362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9484/4587/files/craftsman_table_saw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2754/5755/files/microscope_worksheet_with_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/128e46bf-63ff-4eef-ab45-28e4e40bdb59/25929842125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6b87264-fb7a-40f9-9d15-a02e87ead44c/eu4_its_all_greek_to_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0dfc7c1-7133-40e4-8da4-e687e91e7cda/fazilet_y_sus_hijas.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC8 4980 bytes
SHA-256: 540adffa7624633db80a2d3a077d7e1855ecf4b68aeae369ff0255789bc99761
font_01_sfnt_off00007b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B94 2252 bytes
SHA-256: ee967336568f77ff61a5ae04097864f25fb24cf77b94457ab20e22408cc95c1c
font_02_sfnt_off000084fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FC 10860 bytes
SHA-256: 05bbc97a129c9beb56667bb8027a6f90cc5cd5c3433a87803ecf2ace1c8ae3a6
font_03_sfnt_off0000a9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9F8 16076 bytes
SHA-256: b098da79dd067f31ba2c2b8c1c5e919600cd02ab140df2a372f8f699e4c507e4