Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ddfb87e6c4eddc…

MALICIOUS

PDF

48.5 KB Created: 2020-08-14 15:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2020d31bcffc3f1c985e1da2c7f7256a SHA-1: d80fdd932c652a18ade63f2538be01212f6dd96e SHA-256: 57ddfb87e6c4eddc2dd61f066c6955872b79df7a1c6a599ac114fa8f144e99a5
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'sales dashboard ppt template' and includes the malicious URL. The presence of a PDF link farm further supports the malicious intent of redirecting users to external 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.cc/pify?keyword=sales+dashboard+ppt+template
    • http://files.portraithomesnh.com/uploads/1/3/0/7/130740116/bawituduvek.pdf
    • http://files.cleodiivihjen.com/uploads/1/3/1/3/131398264/0a199ed4bb68.pdf
    • https://cdn.shopify.com/s/files/1/0448/6434/0130/files/swtor_space_combat.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4485/files/81286368278.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/skyrim_linen_wrap_id.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/woxoxarifaja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwakuda.pdf
    • https://cdn.shopify.com/s/files/1/0435/0548/3942/files/24234087924.pdf
    • https://cdn.shopify.com/s/files/1/0434/7969/5526/files/gimaxikupijif.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/81765941455.pdf
    • https://cdn.shopify.com/s/files/1/0431/9464/6688/files/77635884426.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0898/files/22568590828.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_off00008041.bin
532306f11d019955391463c8212677573f95b3806f0909c88090552e74b90af5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8041 5440 bytes
font_01_sfnt_off00009286.bin
ae77a298822c5027b8f6c18faa842fa999b1a52890f219e262e23e4774df186c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9286 10112 bytes

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