Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c471c4e6c01ed6…

MALICIOUS

PDF

55.5 KB Created: 2020-08-18 16:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdc074099382d52775e6d323482d6b2f SHA-1: c0cae6e64730a5a120020bc11be4a80cc08c644a SHA-256: 01c471c4e6c01ed68dac1aedca2bd57884f1f4d5afcae9f309fa5a1791ead4eb
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, also contains this URL and numerous other links to external PDFs, indicating a link farm or redirection strategy. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=past+simple+irregular+verbs+exercises+pdf+macmillan
    • http://files.whitewavemedical.com/uploads/1/3/0/7/130738803/dedozul.pdf
    • http://files.fortheloveofallthingsitalian.com/uploads/1/3/0/7/130775751/liwake.pdf
    • http://tosaki.bishophomeservices.com/uploads/1/3/1/4/131453046/7900551.pdf
    • http://files.iridescentideas.com/uploads/1/3/1/4/131406288/gosunebepupaf.pdf
    • http://files.killianhsmusic.com/uploads/1/3/2/7/132740214/d7e1fd3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/64503456967.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/guvebufimuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/xitisojimefonikezizur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47171602999.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1389/files/77704692002.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/smokey_and_the_bandit_soundtrack_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/11523263650.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/71318185180.pdf
    • https://cdn.shopify.com/s/files/1/0447/4336/0663/files/human_body_anatomy_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/clinically_oriented_anatomy_of_the_dog_and_cat.pdf
    • https://cdn.shopify.com/s/files/1/0444/3671/7735/files/houston_tx_zip_code_map.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_off000084d9.bin
86690c17d9da263f2e160aa753c7ca216a4a41964b959f6c851ba9b0b73214cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D9 5744 bytes
font_01_sfnt_off00009848.bin
c96f591fba6f722da2b87e049423d9371ef2b2d7095909704927d314f834b9c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9848 10288 bytes
font_02_sfnt_off0000bb5e.bin
df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB5E 16060 bytes

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