Malicious PDF — malware analysis report

Static analysis result for SHA-256 63fee2e24b7afa99…

MALICIOUS

PDF

40.3 KB Created: 2020-09-17 14:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6721c564ea61632024714a9fd8d9c583 SHA-1: f94286314f73bcb55f830aa048c90ab0c2b39177 SHA-256: 63fee2e24b7afa99020c754dc15dd5eb13152389ff0eecc4e188a43406656697
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=henle+latin+1+answer+key', suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=henle+latin+1+answer+key
    • http://files.middletownfamilypharmacy.com/uploads/1/3/0/7/130775231/cbca23f27a3.pdf
    • http://files.greateventsrecording.com/uploads/1/3/1/4/131408465/finife.pdf
    • http://files.emmafisk.co.uk/uploads/1/3/0/7/130775245/4f9a3.pdf
    • http://files.noblesmed2.com/uploads/1/3/0/7/130739719/riguwuji-vakoviwavifiz.pdf
    • http://files.huntingforadventure.com/uploads/1/3/1/3/131382673/4181390.pdf
    • http://juwedo.pranaprenatalyoga.com/uploads/1/3/0/7/130776158/5831982.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/anthem_for_doomed_youth_poem.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/33071323453.pdf
    • https://cdn.shopify.com/s/files/1/0461/9170/6263/files/sizoxajakalenapi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6901/files/51324207505.pdf
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/migos_songs_baseshare.pdf
    • https://cdn.shopify.com/s/files/1/0438/9437/4555/files/pobajozarikajex.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/25230945085.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5644/files/avery_laser_tent_card_5309_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/82568330820.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/windows_10_activator_free_utorrent.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_off00006044.bin
54b106f072a44aaaac1579083c352c8403272f6e772e144cf76b5a8bc9b97c37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6044 4952 bytes
font_01_sfnt_off00007142.bin
7e8ac9c361e89cbbcb60f08a39ca9ac6db6668aa48077bb87e861002b01a50ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7142 10352 bytes

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