Malicious PDF — malware analysis report

Static analysis result for SHA-256 26708e7703c761dd…

MALICIOUS

PDF

33.3 KB Created: 2020-08-29 19:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a68a825ffe1d90a02d0c3705d8a1848 SHA-1: 56fa73e6cbce715c0e53f8690deb6c29702bb885 SHA-256: 26708e7703c761dd4c90414afffbc7fb0a871522a06e0196ee190130121cb55d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL 'https://ttraff.cc/wix?keyword=aadu+valarpu+books+in+tamil+pdf' is identified as a malicious redirector. Additionally, the document contains a large number of links pointing to Shopify, suggesting an attempt to leverage SEO for malicious purposes. The ML classifier strongly supports the malicious verdict.

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://ttraff.cc/wix?keyword=aadu+valarpu+books+in+tamil+pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/74895534543.pdf
    • https://cdn.shopify.com/s/files/1/0430/6019/9573/files/genius_training_student_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0608/files/imap_search_criteria_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/7276/5598/files/68707905085.pdf
    • https://cdn.shopify.com/s/files/1/0461/8993/6798/files/99231145944.pdf
    • https://cdn.shopify.com/s/files/1/0428/8846/2495/files/5976233705.pdf
    • https://cdn.shopify.com/s/files/1/0452/0207/9893/files/search_everything_free_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/78044399730.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/7725259027.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/7558131782.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/download_arabiyah_baina_yadaik.pdf
    • https://cdn.shopify.com/s/files/1/0467/7304/3353/files/division_de_un_segmento.pdf
    • https://cdn.shopify.com/s/files/1/0432/1076/8546/files/gixubatepejupiba.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/technical_analysis_forex_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/eve_uni_npc_damage_types.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/52960416633.pdf
    • https://cdn.shopify.com/s/files/1/0431/1577/4108/files/d_d_guide_book.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004811.bin
b712cde0569a6238c1dda270242671b73edb3b027a8e161ad0092b01362d54a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4811 5440 bytes
font_01_sfnt_off00005a74.bin
1d281bc7460ffedd9d4aec6ea38074999294af7ee23e4792c695cafe92b5d0ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A74 8768 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.