Malicious PDF — malware analysis report

Static analysis result for SHA-256 8787f216f7ef535c…

MALICIOUS

PDF

41.6 KB Created: 2020-08-06 22:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 22c40716d07e6296df36ea2d2c90bfaa SHA-1: 6e3ce54d614c4ae407c7ead4c4782c317667376a SHA-256: 8787f216f7ef535cd14733498211107046a994d3c2163094bafab4a2a8469b00
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known to host malicious content. The document body, though obfuscated, contains URLs that appear to be part of an SEO link farm designed to lure users with fake download offers. The ML classifier strongly indicates maliciousness, and the presence of redirector links suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=the+beginner+s+book+of+salah+by+ghulam+sarwar+pdf In PDF document text
    • http://files.northlandrentalhomes.com/uploads/1/3/0/7/130776626/4fa9d6c.pdfIn PDF document text
    • http://files.ssyyogalife.org/uploads/1/3/0/7/130775429/mekoguremozudefat.pdfIn PDF document text
    • http://files.palsjamaica.org/uploads/1/3/2/7/132710748/c315858d3b.pdfIn PDF document text
    • http://files.theclassicequestrianllc.com/uploads/1/3/1/4/131437733/lawalipituwi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/fundamentals_of_aerodynamics_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jotinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3280/5527/files/58324089204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/kesanajuridotokotixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94323725826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/1045597098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/gabesigaxan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/35952628341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/65905600296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/zen_mind_beginner_s_mind_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/nuketown_code_for_black_ops_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/jupat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/37447942180.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000604d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604D 5804 bytes
SHA-256: a333a40fecc11a26bbae53f0a7f8e92905cbdbe33650a483d071d111b4fdcc60
font_01_sfnt_off000073f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F7 11096 bytes
SHA-256: 62ae687d5c087ff9bfd524117006ad0fe529805af76ccf714a53f379e2724207