Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf7a0c8216b31cb…

MALICIOUS

PDF

41.4 KB Created: 2020-07-08 20:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 67ae12b5a586763cb6c08323c44fd54d SHA-1: 66a63e71709480f5109124d78cd84df72c431e51 SHA-256: 0cf7a0c8216b31cbf34253c166dd803c6eaa155b125e06a4a92cc828c6842d8e
194 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its extensive use of SEO-optimized links pointing to a redirector and then to various PDF files. The primary redirector URL is https://ttraff.com/wb?keyword=baby%20shark%20chords%20pdf, which is designed to lure users under the guise of a free download. The document body contains numerous embedded URLs, indicating a link farm strategy to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.com/wb?keyword=baby%20shark%20chords%20pdf In PDF document text
    • http://files.juliamandalaweaver.com/uploads/1/3/1/3/131380138/5479598.pdfIn PDF document text
    • http://files.theesquiremovie.com/uploads/1/3/0/7/130738821/e97aa5f596.pdfIn PDF document text
    • http://files.leilaspaws.com/uploads/1/3/2/8/132815172/8a8938c.pdfIn PDF document text
    • http://files.stylezbyomi.shop/uploads/1/3/2/3/132303020/946843fca.pdfIn PDF document text
    • http://files.elysianbotanica.org/uploads/1/3/1/4/131437454/6785233.pdfIn PDF document text
    • http://files.creativecounselingsrq.org/uploads/1/3/2/7/132710787/5366484.pdfIn PDF document text
    • http://files.madebyloulou.net/uploads/1/3/1/8/131871891/59bfb6ba928ffb6.pdfIn PDF document text
    • http://files.jewellhjohnson.com/uploads/1/3/2/8/132816158/252b1d3f634b0.pdfIn PDF document text
    • http://files.gogovernors.com/uploads/1/3/1/4/131406762/6528224.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dulevope.files.wordpress.com/2020/06/worizukelenexujoxa.pdfIn PDF document text
    • https://simovojeb629202265.files.wordpress.com/2020/06/49867851145.pdfIn PDF document text
    • https://dapiloxi.files.wordpress.com/2020/06/zitebokeresurusotawibogiw.pdfIn PDF document text
    • https://laderafi767971175.files.wordpress.com/2020/06/6372487125.pdfIn PDF document text
    • https://wodugodew84787651.files.wordpress.com/2020/06/99819888029.pdfIn PDF document text
    • https://gijifibu.files.wordpress.com/2020/06/37054544364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5936 5000 bytes
SHA-256: 4a909051476753e415ea050ce1db4a1f2ca576c1fc5e980ce6ad4300a25e3778
font_01_sfnt_off00006a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2F 14816 bytes
SHA-256: 51a67da8dbc7cd96fb6feb2b7ee2faf3e0de59b13de06dbdcb963442428daf75