Malicious PDF — malware analysis report

Static analysis result for SHA-256 947573a1ec1c203e…

MALICIOUS

PDF

117.1 KB Created: 2020-10-27 21:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c7c31a8baa179b917bbee13e99d05eed SHA-1: 146e74ac5facc44213954022a391d570774331da SHA-256: 947573a1ec1c203e130cdbe7b1a04b46d0041eb6dab2a32f540d104d004c539d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ggtraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, embedding a large number of external links, many of which point to benign Shopify URLs but one is identified as malicious. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL and the link farm behavior suggest an attempt to redirect users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=oracion+parecida+al+padre+nuestro In 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/1/0493/1285/8278/files/punchline_algebra_book_b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7502/6078/files/cummins_generator_specifications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5581/6090/files/1.5_iqr_rule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/79235795982.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/89022333336.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/vowikegi.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/44981189579.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/88045856661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/515fceff-c6ed-4e21-9f7f-4b407a77f842/sawoxovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6915220f-67f4-4c24-8382-bbb7b457b715/40732379282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b40be1d9-2928-458e-bf5e-149a0161a94b/37730297862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba5aa0c-4898-42e2-9aff-b209b5cef7b3/gurunonu.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/studietrust_bursary_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/kiluvarumolusajawid.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/36622639063.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/winopepesid.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/81290932132.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/asepsia_antisepsia_y_esterilizacion.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/ipad_apple_pencil_annotate.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/app_to_edit_documents_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/ratesaroxu.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/41757330150.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/mozijutatete.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/nuliwemoziwarira.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/mixivisuruxebujipato.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/raxuli.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DBF 5092 bytes
SHA-256: 1fb1c455605a7b28dad3b80993afdb7adbd525938e6987c06ff624eb5f9ae765
font_01_sfnt_off00017f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F13 20112 bytes
SHA-256: 81f5770b01311584780497f5f85fc59d4602290e5a45bb866a2e5d88180931a5
font_02_sfnt_off0001b49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B49C 6252 bytes
SHA-256: 3947a9c0d4642b246539f70dfa804d8f3e604c9bd08a332cdc0bf63fc8bc2b4e