Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7ff8cc6c3e6431…

MALICIOUS

PDF

103.6 KB Created: 2020-08-20 03:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2679fe8a882dabb3b7b4a2f9690242ef SHA-1: 628653c0d892d8de969e2f62407307bb6df42dbf SHA-256: bb7ff8cc6c3e6431f9c47bf98bdbbca234ef9db26c63eb1071fae78c23d2aace
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains a link that redirects to a malicious URL, masquerading as FDIC call report instructions. This is further supported by heuristics indicating a malicious redirector link and a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains the URL that is likely intended to trick the user into clicking it, leading to a callback phishing or tech-support scam scenario.

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.cc/pify?keyword=fdic+call+report+instructions+september+2019 In PDF document text
    • http://files.staccounting.co.uk/uploads/1/3/1/3/131397971/pisedegomeva.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/1/0431/3877/7249/files/sobironefagolufaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8030/2244/files/bootstrap_template_for_tutorial_website.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4021/1097/files/videsabami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0046/2501/files/jizeguwawaromaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/bethesda_system_for_reporting_cervical_cytology_third_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3749/7243/files/computer_security_powerpoint_free_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/kidiwekumiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/xijazutaxosefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7250/files/zawetexemapifuvasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66916333827.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
🗂 Part of campaign: staccounting.co.uk 3 samples

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15715 5796 bytes
SHA-256: 4009ed989ce6b8e271a3263c6d219e2caebd12f3b06f43f85685742464bec1c7
font_01_sfnt_off00016aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AAA 11180 bytes
SHA-256: 013b0500b3de31380c64dd303acd7ab60a25b490d744beda7faad4df3a915310

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