Malicious PDF — malware analysis report

Static analysis result for SHA-256 342f1b5db6c9463e…

MALICIOUS

PDF

33.9 KB Created: 2020-08-29 10:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6abc092ed1546acb7d03f3960d86022 SHA-1: 2e2306178906ccd70afb44613d003579fcfb4400 SHA-256: 342f1b5db6c9463ec8bddf18ea9a162ba93c3444b1465509203e32619fff7d6e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of many external links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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=carnival+row+soundtrack++free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0461/9013/3406/files/como_hacer_un_render_en_sketchup.pdf
    • https://cdn.shopify.com/s/files/1/0437/9879/0301/files/purple_martin_birdhouse_plans.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3846/files/93317761982.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2004/files/andhra_state_board_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0992/files/nanimekunur.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9273/files/ejemplo_de_balanced_scorecard_de_coca_cola.pdf
    • https://cdn.shopify.com/s/files/1/0455/4152/3621/files/biomedical_waste_management_act_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/66294103425.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5293/files/andhra_bank_application_for_mobile_push_alerts.pdf
    • https://cdn.shopify.com/s/files/1/0451/4365/4565/files/polycab_lv_cable_catalogue.pdf
    • https://static.usrfiles.com/ugd/b8c837_94d27aa776bf44f5a4c7e6f533809d00.pdf
    • https://static.usrfiles.com/ugd/b8c837_779a8f071e7742d2b48e30c0235c4d51.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1883669ff4c45148f125acd4cf4194b.pdf
    • https://cdn.shopify.com/s/files/1/0429/3256/8220/files/xakoguwezosikapaxuriw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/66186208827.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/76628308411.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000475b.bin
8795e4521ffd26f550d30b8ad5175b4f8fbfcd1d1fa4af39753e83e0d17d9905		 pdf-font-stream PDF embedded font (sfnt) at offset 0x475B 5136 bytes
font_01_sfnt_off000058f7.bin
3b7835ed57dee72589f80659330d1e88dc2030b239b164031d5355ea19ed9c9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F7 9900 bytes

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