Malicious PDF — malware analysis report

Static analysis result for SHA-256 6678a8c84b717524…

MALICIOUS

PDF

49.1 KB Created: 2020-08-06 15:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85c7b2347006a458f6fe568ee94dae87 SHA-1: b6c9e631f6dd4abac4389a9ea08694f549b7df04 SHA-256: 6678a8c84b71752446af51394e059148692fe104445fe6ef1d7dabf87067267d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of a link to 'ttraff.cc' strongly indicate a phishing or redirection attempt. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=cerebral+malaria+treatment+pdf', suggesting a lure to a malicious site disguised as a treatment PDF.

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=cerebral+malaria+treatment+pdf
    • http://files.wrosephotography.com/uploads/1/3/1/4/131406412/76eca58.pdf
    • http://files.spanishoaks.com/uploads/1/3/0/9/130969306/9718001.pdf
    • http://files.truenorthministries1.com/uploads/1/3/1/3/131398085/23b6dd.pdf
    • http://dakizo.ncbbq4u.com/uploads/1/3/1/8/131857334/f75d551.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/5543/2348/files/zelutomugenodojizodowe.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/kukejatewonupez.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/albuminuria_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdf
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/47287107282.pdf
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/laxirojuxakixab.pdf
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/wesafovule.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/89714515719.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/68952179647.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nuxekenosagulowagegur.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074d5.bin
e84b8ebb5d87dcc4205d9319e40464fbc4341afd0e79497c3b94ecf4e5186268		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D5 4848 bytes
font_01_sfnt_off00008526.bin
219df24f95038832aa407b504c8283af94d1011dbe5401f31f050c60ec682329		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8526 10740 bytes
font_02_sfnt_off0000a911.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA911 4324 bytes

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