Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4cb91236cec6a4…

MALICIOUS

PDF

68.9 KB Created: 2020-08-23 03:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1464077a392642116c6e4a43de840cd7 SHA-1: baae6c43b4e25a4af4e1ab4da5350dd1cbd000b3 SHA-256: dd4cb91236cec6a40ffc6afbc35ecab8d7d6b4ea006334ccf377e1dcfa407140
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a reference to 'fire report colorado springs' and the malicious URL. The presence of a callback phishing lure heuristic further suggests a social engineering attempt to engage the user. The primary attack vector appears to be directing the user to malicious infrastructure via a link.

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=fire+report+colorado+springs In PDF document text
    • http://files.sanctuaries.org/uploads/1/3/1/8/131856443/jebegesogitesol.pdfIn PDF document text
    • http://files.penncenterwest.com/uploads/1/3/0/9/130969151/gurijad-vorujo-wozumon.pdfIn 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://cdn.shopify.com/s/files/1/0432/3295/2477/files/convert_in_to_word_document_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7301/9808/files/55936285726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/7845925621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/characteristics_of_modernist_poetry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/9041/6550/files/o_mio_babbino_caro_guitar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/85289009738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4553/5400/files/82647125770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/pharmaceutical_calculations_14th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6877/4814/files/98314015523.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB983 4984 bytes
SHA-256: 9188ac99b3c91034b2d19f4b08a23d2edffa95c3f5b1c0f0c868cf768993de47
font_01_sfnt_off0000ca79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA79 14520 bytes
SHA-256: e758759085912fbd0a8743d34dde4ea3d0f43e4452837bde7957512a4fb826ad
font_02_sfnt_off0000f881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF881 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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