Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c56f9bbd99e7d4e…

MALICIOUS

PDF

59.9 KB Created: 2020-09-03 20:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afba5c30c3a0a3d6548b0fa05edd9a3d SHA-1: 73551a84ca73b4b6cdfa8fcbf83fe40f90d5a41a SHA-256: 0c56f9bbd99e7d4ed775a846f7232d47d87610817ead2802a320621ab96ac65e
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.link/wix?keyword=kindle+paperwhite+2019+supported+formats', is flagged as a malicious redirector. The document body also contains this URL and other Shopify links, suggesting a link farm or phishing lure. The ML classifier strongly indicates maliciousness, supporting the attack pattern of luring users 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.link/wix?keyword=kindle+paperwhite+2019+supported+formats
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/halimbawa_ng_teknikal_na_pagsulat.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8471/files/akkadian_language.pdf
    • https://cdn.shopify.com/s/files/1/0437/4904/8474/files/97930454829.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/64641298131.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/83284146990.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/normalidad_y_anormalidad_epidemiologia.pdf
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/xaxabuluzijusumukodikijil.pdf
    • https://cdn.shopify.com/s/files/1/0434/4954/8966/files/the_feminism_and_visual_culture_reader.pdf
    • https://cdn.shopify.com/s/files/1/0435/8055/5419/files/luzixeligot.pdf
    • https://static.usrfiles.com/ugd/4f270c_1fa066f4b46b4d16a74cb4993c7823a5.pdf
    • https://static.usrfiles.com/ugd/1d64af_04f101bac8544e0aab0af7b95d66c704.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7493162631d4435b092bae9165f26ed.pdf
    • https://static.usrfiles.com/ugd/d54300_9f7b18b85a8e4b4caf3de0f7f941dd31.pdf
    • https://static.usrfiles.com/ugd/c75f60_7b952cc7d68f4ff485bbcb20ae0bf9c4.pdf
    • https://cdn.shopify.com/s/files/1/0429/2893/0979/files/caddisflies_the_underwater_architects.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7207/files/molecular_genetics_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/panifobofigususifeza.pdf
    • https://cdn.shopify.com/s/files/1/0441/1500/1496/files/used_bmw_m3_manual_transmission.pdf
    • https://cdn.shopify.com/s/files/1/0447/9336/4637/files/15357027185.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009317.bin
b09f457e174cfe751bd3693f2432d379f88b477b294473a8542bd2e712b004c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9317 5824 bytes
font_01_sfnt_off0000a6da.bin
a2e9b48b8fb819ee319f7f8445b259c7338d980574c7107a3de0c516d7f8c338
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6DA 11100 bytes
font_02_sfnt_off0000cd04.bin
c3d4801e109e08d211b0bcc3aa8a72f52b2e2cdc27e0c523e0ccf2f34819f209
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD04 16108 bytes