Malicious PDF — malware analysis report

Static analysis result for SHA-256 4666c4ea7fc47ce6…

MALICIOUS

PDF

56.9 KB Created: 2020-08-03 18:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f517b3834c602081b61dea24cfe209a9 SHA-1: eb875d336a370dd1aa495b1c60871252ef9abd32 SHA-256: 4666c4ea7fc47ce614f58dd6fa684c466bf9029b834edfbff38a0cb007ce3a19
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URL suggest a lure to download a PDF, which is a common tactic for phishing or malware delivery. 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.cc/pify?keyword=baixar+livro+as+catacumbas+de+roma+em+pdf
    • http://files.upscaleresale4kids.com/uploads/1/3/1/3/131383456/1940673.pdf
    • http://files.theaestheticloft.net/uploads/1/3/0/7/130738794/1434a91c.pdf
    • http://files.enlightenedcatering.com/uploads/1/3/1/3/131379343/3267069.pdf
    • http://files.classupdates.org/uploads/1/3/0/7/130775866/sulogos-defagak-mokuzozines.pdf
    • http://femujax.hillsborolearningcenter.com/uploads/1/3/0/8/130874218/kevisa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8547/7541/files/rurebisuritoza.pdf
    • https://cdn.shopify.com/s/files/1/0432/7024/2460/files/zodoninukokozodufarenu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/mekone.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/begej.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/46879121162.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/25191546327.pdf
    • https://cdn.shopify.com/s/files/1/0434/7458/3702/files/26447926545.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/jigijirivirujigana.pdf
    • https://cdn.shopify.com/s/files/1/0437/6195/9069/files/the_data_model_resource_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/98444870510.pdf
    • https://cdn.shopify.com/s/files/1/0437/9063/1064/files/99803414378.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007706.bin
fcce60f61bc179e18dc835c22f55ab39e0e917615d304138c653d35d1ec5e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7706 5396 bytes
font_01_sfnt_off00008961.bin
e239bb0f4e8e9c2b50d5416d3a334c7fe2e01dc2f4fde6b90dbebc1993c91a17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8961 13052 bytes
font_02_sfnt_off0000b021.bin
563c528807982a628cea44f9675d1c248d1cf494f9e26e34baaf1509457f088b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB021 16344 bytes
font_03_sfnt_off0000c5ed.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5ED 4324 bytes

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