Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a66a7b723c087eb…

MALICIOUS

PDF

42.6 KB Created: 2020-08-02 18:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cf9e83c328d57b4497c4b0072f4adf5 SHA-1: c9956d97871a95aa4f3594f50103ad57cd1a454c SHA-256: 7a66a7b723c087eb730c94caa223a431095ae783f60414c51251df27028225e4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=ap+computer+science+2016+free+response', suggesting a phishing or scam lure. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination and potentially spread 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.cc/pify?keyword=ap+computer+science+2016+free+response
    • http://files.scottwbrooks.com/uploads/1/3/0/7/130740221/furukapibe-zuvip.pdf
    • http://files.visionsofadventure.com/uploads/1/3/0/9/130969761/nutusesidobubenono.pdf
    • http://files.centenarylittleathletics.com/uploads/1/3/2/7/132740665/sasumunuxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/tixowujenifuvil.pdf
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/border_shadow_css.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9557/files/tifumurasirapuwibobawo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5203/9328/files/46070422853.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/92357530839.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/84873615522.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/31130664296.pdf
    • https://cdn.shopify.com/s/files/1/0430/2258/1923/files/bufekubilogiwaweliluwaxak.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5654/files/free_download_of_rapid_sql_server.pdf
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/46030285280.pdf
    • https://cdn.shopify.com/s/files/1/0437/8958/2487/files/edit_current_website_bookmarklet.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/81298202232.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ddf.bin
fc6bffad419ce002b72c796bc7095dc347bcd66b0b0c6dab54f307e7940e2441		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDF 5388 bytes
font_01_sfnt_off0000702b.bin
53b1613381b89f5a7ad1cf6211a0315be8e10ecc8d602e34341c8605ad2bcd9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702B 14192 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.