Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5628193b75268d…

MALICIOUS

PDF

45.2 KB Created: 2020-08-20 07:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20278fdde167ec44a5c36db3883279ad SHA-1: 3061bdb7a50f742cff8689b6926a09f42a36bec4 SHA-256: 2b5628193b75268defb5366a43eb89c1cd6519ea9d4c4a0c8c33581fd9e6db9f
154 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of embedded URLs, with the primary redirector link pointing to a known malicious domain. The document body itself appears to be malformed or obfuscated, but the presence of numerous links suggests a link farm or redirection tactic to distribute further malicious content.

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.ru/pify?keyword=taylor+princ%25C3%25ADpios+de+administra%25C3%25A7%25C3%25A3o+cient%25C3%25ADfica+pdf
    • http://files.thefreckledpeddler.com/uploads/1/3/1/3/131398246/wixapajar-xutolosakisajos.pdf
    • http://wokegobuw.libertyrecbc.com/uploads/1/3/0/9/130969060/midixepepika.pdf
    • http://files.peggytidwell.com/uploads/1/3/0/7/130776015/geloxe-wiwepi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3064/9749/files/adda247_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/18412846449.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/91091028271.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0549/files/cetuximab_head_and_neck_cancer_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/43054664815.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/75813849199.pdf
    • https://cdn.shopify.com/s/files/1/0433/3037/1738/files/vibetofuzigowulo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/vuwake.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/dumisupawikuxun.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/fanujodimegesi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99914628395.pdf
    • https://cdn.shopify.com/s/files/1/0431/9854/6084/files/36019619274.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/libro_caballo_de_troya_4.pdf
    • https://cdn.shopify.com/s/files/1/0432/5752/8480/files/therapeutic_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/asma_ocupacional_2020.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_off00006cc3.bin
72e1e930b3f46e663674e82d0ba3625f1a8bd1836ba1aee931802916e83ae994		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC3 5904 bytes
font_01_sfnt_off00007ff0.bin
1029764357e4c876a2d1c92ee5fdbd23fb9b23ad78cd7b6ff8f8d150d7599c18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF0 12276 bytes

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