Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef5604b94a401d4…

MALICIOUS

PDF

79.0 KB Created: 2020-09-10 17:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ad25d234460155c43bb9d87ebbedb019 SHA-1: 94a37724b6c7c7b4d9575e80c49376c10997e4d5 SHA-256: 7ef5604b94a401d41166dc0fb212669b5d18c79aaabf61f124d6e36a2f6a29a6
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a large number of external links designed for SEO manipulation, likely as part of a phishing campaign. The document body, though heavily obfuscated, contains URLs that point to a redirector and benign-looking PDF files, suggesting a lure to download potentially malicious software. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=godex+g300+barcode+printer+driver In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/834936_bc5c69b2e6394aa49a5545ceda5345f7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c7a620_436be6207403405c836f94e6067e38f2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3649d2_e4b7a82267f844d286c77e0d21a8681d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/98e2de_f77018ac57a94b3f906bbfa920f52570.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eb6612_7d426bf07a3248ac9e004e21f6533f4b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/96768c_aee964086c534403bf74b1305bcab913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/veledofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8474/1798/files/63742273397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/1197/3799/files/lung_volumes_and_capacities_definitions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8769/9876/files/campaign_finance_reform_supreme_court.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0541/9418/files/bachelor_thesis_computer_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/23558671441.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC190 2880 bytes
SHA-256: aff11289bf87f92bc53c0e2abc335208e29b6db8a954e82fd0a5595ffa95d344
font_01_sfnt_off0000cbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCE 5424 bytes
SHA-256: d3eb83560a29a33473ab586800fe7f763c8fce1287356e15c7fe88e7a044d2ff
font_02_sfnt_off0000de53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE53 13804 bytes
SHA-256: 13014fe9febe84bcd00948825405765d5f10cf4bdc3d95aa335829e83519aed9
font_03_sfnt_off00010add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADD 16152 bytes
SHA-256: 9dd161ad083bde31f1785977080a21cd00ffd1d65af7312c0685ba069ea0c2ef
font_04_sfnt_off00011fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2