Malicious PDF — malware analysis report

Static analysis result for SHA-256 03dff88659ede187…

MALICIOUS

PDF

66.2 KB Created: 2020-08-09 23:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20aa39ecb7c3bab043f40441d60813e1 SHA-1: b24dacff9383b1c5c3c9399ad2b1552f045bab1d SHA-256: 03dff88659ede187399376903ac823a51dc7c1d8ae164cf059dab0a51eba1161
162 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic firings indicate the PDF is designed to link to external malicious infrastructure, likely for phishing or malware distribution. The presence of urgency language further supports a malicious intent to trick the user into clicking the provided link.

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=aha+guidelines+acs+pdf
    • http://files.danagbeje.com/uploads/1/3/2/8/132814096/libiriner-sogeferejimatas-pelafufonaju-majow.pdf
    • http://files.martayogahome.com/uploads/1/3/1/3/131384335/zefuzizo.pdf
    • http://files.rogerckellygroup.com/uploads/1/3/1/3/131383480/jirova.pdf
    • http://files.garritylpc.net/uploads/1/3/0/7/130775249/803477.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9239/3640/files/waworisuduxedez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/arthur_c_clarke_rama_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8565/files/3077318874.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8062/files/curriculum_definition.pdf
    • https://cdn.shopify.com/s/files/1/0440/1741/8405/files/git_recover_deleted_files.pdf
    • https://cdn.shopify.com/s/files/1/0436/7699/1653/files/97244589816.pdf
    • https://cdn.shopify.com/s/files/1/0440/4533/6726/files/39010775882.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/45759368015.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/7280208755.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/zatixevape.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/49018062939.pdf
    • https://cdn.shopify.com/s/files/1/0433/6962/7799/files/canon_5d_mk_iii_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/3073/9106/files/jupakamov.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_off0000c6ed.bin
23f11ed2b58454ed4a734c354f8365b1b68825d04046351bb54dd91a9f02f875		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6ED 5308 bytes
font_01_sfnt_off0000d904.bin
f5f1f7c6737219cf1a887fe939cdf7320ffd58db7b59ca4935405e47c176f834		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD904 10144 bytes

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