Malicious PDF — malware analysis report

Static analysis result for SHA-256 c677868638e07318…

MALICIOUS

PDF

35.5 KB Created: 2020-08-09 16:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8242c18f903a3e018198971e0832542 SHA-1: d8e34ceec48d5fc8a0c3060fe56444af214b2678 SHA-256: c677868638e073182a4e8ca0dc22256d4d37c27848a4ea5d55286f285036b323
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to domains associated with link farms and redirectors. The primary malicious URL, 'https://ttraff.cc/pify?keyword=blessed+be+the+name+of+the+lord+chords+pdf+g', is identified as a malicious redirector. The document body, though partially corrupted, contains this URL and other links, suggesting a social engineering tactic to drive traffic to malicious sites. The ML classifier 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=blessed+be+the+name+of+the+lord+chords+pdf+g
    • http://davoguju.watchwordediting.com/uploads/1/3/0/7/130775934/faladajesevam.pdf
    • http://vupesate.studio-luxe.com/uploads/1/3/0/8/130874457/nokolimofovuwemasuk.pdf
    • http://bitida.altent.com/uploads/1/3/1/4/131482995/zawirovobatiden-rozid-mosok-ninarifupopa.pdf
    • http://files.elitetheatre.org/uploads/1/3/1/4/131438432/5ac38aeaa2.pdf
    • https://cdn.shopify.com/s/files/1/0430/4902/5690/files/vufisiviku.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6616/files/hydrothermal_synthesis_of_nanomaterials.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/ralovojamesuwipekuxepaju.pdf
    • https://cdn.shopify.com/s/files/1/0431/0944/9884/files/ashrae_standard_62_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/8721/5269/files/dynamic_bone_settings.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/pe_reference_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/gulavimofe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37357510366.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/sapivazobedumorakora.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/free_convert_a_file_to_word_document_for_editing.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/27501464312.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/bukolapexigavakefabizi.pdf
    • https://cdn.shopify.com/s/files/1/0440/7217/3733/files/haloalkanes_and_haloarenes_ncert_chapter.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_off00004b8a.bin
d5c61ad7d29805ee51a7f42309cc0abda49fc7a29e8869d4d49b44e9d134c6bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B8A 5760 bytes
font_01_sfnt_off00005eee.bin
471d1777891157747195f20a9b094811d82dbc359f4d517ca74e4bc98f3c0356		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEE 9336 bytes

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