Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb1aea24cd67fbe…

MALICIOUS

PDF

45.2 KB Created: 2020-07-13 03:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 40844a0f5c26e40727eb42510609c008 SHA-1: e35a8767cfd6d43a4722b0cccdaeadf7a5e7645c SHA-256: ccb1aea24cd67fbe89af3dfa082a1e8662ae6a58164643abbe8b9b920533eaa7
194 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link and a large number of embedded external PDF links, indicating a link farm. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=marie+clay+running+record'. The document body appears to be corrupted or heavily obfuscated, preventing a clear understanding of its intended lure. The presence of numerous links suggests an attempt to distribute malicious content or phish users.

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.cc/pify?keyword=marie+clay+running+record In PDF document text
    • http://files.lisamaki.blog/uploads/1/3/0/7/130776518/955749.pdfIn PDF document text
    • http://files.evelineverhulst.nl/uploads/1/3/2/3/132302819/julupe.pdfIn PDF document text
    • http://files.madhopeblog.com/uploads/1/3/0/7/130739522/3911468.pdfIn PDF document text
    • http://files.d17teachers.com/uploads/1/3/1/4/131453943/tofujipasazetu.pdfIn PDF document text
    • http://files.magicandfun.co/uploads/1/3/1/3/131381712/gewinakem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/24310330347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/10980410453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3785448733.pdfIn PDF document text
    • https://merifajal.files.wordpress.com/2020/07/basirifogu.pdfIn PDF document text
    • https://vikuriwugapo.files.wordpress.com/2020/06/wurivegajadilojemaburi.pdfIn PDF document text
    • https://geluxomu.files.wordpress.com/2020/06/91441583596.pdfIn PDF document text
    • https://gujobuzagam594322867.files.wordpress.com/2020/06/76980324964.pdfIn PDF document text
    • https://garuwade.files.wordpress.com/2020/06/rukubomadenesidux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47475247643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/litusisezira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/15088961682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/48482030292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kawovuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.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_off00007394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7394 4836 bytes
SHA-256: 6550342b078ee95beecc569acd6e79426f87003228ff64bacf5f90c281afc518
font_01_sfnt_off0000840b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x840B 10548 bytes
SHA-256: 61c710d3282dcc2d71e60bad37c54f8dbac67b7868ed0d08b0427e49f559a5f6