Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bec3c4c700bf87d…

MALICIOUS

PDF

53.7 KB Created: 2020-07-25 01:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa0c7ac08151a1e9673788899dfacea3 SHA-1: a31e708342a37638ee261927ec6ed9f350aade6d SHA-256: 6bec3c4c700bf87da8e109f2c96e81fafa7b434c0b8598b1dbc34fbce931e914
162 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service. One of these links, 'https://ttraff.cc/pify?keyword=alif+laila+bangla+pdf+free', is flagged as malicious. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=alif+laila+bangla+pdf+free
    • http://files.mouseandmeco.com.au/uploads/1/3/0/9/130969146/bb6eb39.pdf
    • http://files.rachelcrawford.org/uploads/1/3/1/3/131384606/bf9287b.pdf
    • http://files.knotsofbows.com/uploads/1/3/1/4/131454286/6101680.pdf
    • http://files.davero.ca/uploads/1/3/1/3/131381374/abc53c1.pdf
    • http://files.larryssportsexchange.com/uploads/1/3/0/8/130874128/folerezome.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/64123690742.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/93223294338.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/97734531958.pdf
    • https://cdn.shopify.com/s/files/1/0439/7717/9294/files/84438791140.pdf
    • https://cdn.shopify.com/s/files/1/0431/0682/8441/files/91909315646.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/baganivewom.pdf
    • https://cdn.shopify.com/s/files/1/0435/4277/3914/files/37572763057.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0437/6150/0309/files/xawabegugizakekape.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c77.bin
4850c2a106eff6a706cb44569e1f972a0e3caaab4cd98b0508bdf3b3ebfb124e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C77 4760 bytes
font_01_sfnt_off00007c98.bin
5c91c2100c77e66391dce17715d744bc526dd16c6111dadbe915532cfe19eb95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C98 10688 bytes
font_02_sfnt_off00009cf2.bin
708ca79262539a974e82f28df261b1441a2ab093243e9e7583a9aa38d3d604a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF2 14044 bytes

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