Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cfe341e0a233e6e…

MALICIOUS

PDF

41.6 KB Created: 2020-09-05 03:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10b295eb016230f5e4411fbf5cf51ad2 SHA-1: f5f7a4ef773cc9b4e1e4efd5f2233778fca8db4a SHA-256: 1cfe341e0a233e6e9753526adef16fd99b25f1d23fbe59e4cd7a0bdf4504ac46
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=news+report+example+pdf'. This indicates the document's primary purpose is to redirect the user to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to increase the visibility of the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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=news+report+example+pdf
    • https://cdn.shopify.com/s/files/1/0432/4261/9035/files/separamefufinato.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/attached_image_powered_by_blogtronix.pdf
    • https://cdn.shopify.com/s/files/1/0437/1415/0553/files/65619354463.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5745/files/loraine_boettner_la_predestinacion.pdf
    • https://cdn.shopify.com/s/files/1/0430/7438/8119/files/32941904325.pdf
    • https://static.usrfiles.com/ugd/6812d7_8695b73193984cc7baffb07aeb912ce7.pdf
    • https://static.usrfiles.com/ugd/a474dd_a26773b7bbcf485a8e74cac33572112e.pdf
    • https://static.usrfiles.com/ugd/e02969_959a0418ce6244acb4728e4e81463503.pdf
    • https://static.usrfiles.com/ugd/fd7405_95559c67b4f044a3823ab13bbc269804.pdf
    • https://static.usrfiles.com/ugd/9b5f63_6cb62c4bffa244e983971db50e99dfc9.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/80156046898.pdf
    • https://cdn.shopify.com/s/files/1/0437/3138/6529/files/mixowawidowozusukadaxulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/60538515991.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9273/files/sewage_treatment_steps.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/tepuxasixuz.pdf
    • https://cdn.shopify.com/s/files/1/0464/7357/6616/files/waveguide_coupler_lumerical.pdf
    • https://cdn.shopify.com/s/files/1/0434/8274/2950/files/maplesaga_bishop_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/7072/3998/files/atkins_quimica_fisica_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9387/files/47725967330.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7990/files/bhakti_yoga_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_off000064e6.bin
88a099da20076e4651ea2f398ff5c204c824159a9a99379b6328316d532fdf95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E6 5316 bytes
font_01_sfnt_off00007700.bin
dd3e0ecba52b0350320b6bf3a6cd67fbdb9d0f283dbba92d5fb31781495be766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7700 10144 bytes

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