Malicious PDF — malware analysis report

Static analysis result for SHA-256 d880c5bf263505ee…

MALICIOUS

PDF

45.1 KB Created: 2020-09-19 19:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0b38cdeadb161149f726362ff6a3cfb SHA-1: 05b2c23fed1e46185212db7f8ed7c0f5f3442a47 SHA-256: d880c5bf263505eee0f22c2092affcafeb16edebcd7465a6a97b950c61dd7996
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious content. The document body and heuristics indicate a lure, likely for phishing or malware delivery, by presenting a link that appears to offer movie content. The presence of numerous other PDF links, many hosted on Shopify, suggests an attempt to obscure the true malicious destination.

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.link/wix?keyword=maid+in+manhattan+full+movies
    • http://juzidu.strideaheadcoaching.com/uploads/1/3/1/6/131636947/6196618.pdf
    • http://files.artofsales.us/uploads/1/3/1/4/131408170/6ab81cfe7bc2189.pdf
    • http://files.yorkunidarts.com/uploads/1/3/1/3/131398367/kibovafi-wodumomizarexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9702/files/wekunepogu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7730/files/crossword_app_answers_castle.pdf
    • https://cdn.shopify.com/s/files/1/0435/2383/4024/files/tujuboruripukudimotebit.pdf
    • https://cdn.shopify.com/s/files/1/0464/5666/8328/files/jeux_d_eau_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0461/4884/5731/files/osrs_kraken_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/addition_1_10_worksheets.pdf
    • https://d05e7124-d5b9-4c6a-8dcd-e6afb68ffb50.filesusr.com/ugd/cc3ca9_9382cab2749f45fd968d2d1890d77b56.pdf?index=true
    • https://e78d4d59-e785-4e88-9e36-2fdf6a140921.filesusr.com/ugd/7baf93_9803d8b2ce944914811400d7b9c4e097.pdf?index=true
    • https://be58587a-cf2b-4cbb-92f2-6ccfcd1964fc.filesusr.com/ugd/77941b_9a0bb300e10c4f6f874b250b6a900153.pdf?index=true
    • 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_off0000729b.bin
da9218f14f827cac1e92c11458f4a625145a8c53e2642126eecc909744509ae0
pdf-font-stream PDF embedded font (sfnt) at offset 0x729B 5116 bytes
font_01_sfnt_off000083fa.bin
b5a3995ea61ba4b70fd9fa02a871a5f26c9f20fe02f638cc4d668ca79d6fc6c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x83FA 10552 bytes