Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d3f58b765e8921…

MALICIOUS

PDF

54.3 KB Created: 2020-08-22 06:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c55444e4338bc9c58cfc6bdde051762a SHA-1: a168425e867d4ec89389a2d77d18fe1a4cac0f01 SHA-256: 22d3f58b765e8921ff9a042f9e99d5f0da7b8adf546240aef2f74b43429faccd
202 Risk Score

Malware Insights

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

The PDF document contains a link farm and a specific malicious redirector URL, suggesting a phishing or scam attempt. The document body text, though partially corrupted, includes "Post office nsc nomination form", reinforcing the lure. The primary malicious URL identified is https://ttraff.com/pify?keyword=post+office+nsc+nomination+form, which is linked to known malicious redirector infrastructure.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=post+office+nsc+nomination+form In PDF document text
    • http://files.sint-maarten-saint-martin.com/uploads/1/3/2/7/132741029/a5f6f01e54.pdfIn PDF document text
    • http://files.bellacanineconstructions.com/uploads/1/3/1/6/131606815/fijipibibuvigof.pdfIn PDF document text
    • http://files.nrmorenorealtor.com/uploads/1/3/1/4/131454373/newob.pdfIn PDF document text
    • http://files.macierenae.com/uploads/1/3/1/3/131380397/7286094.pdfIn PDF document text
    • http://files.theplayfactoryplaygroup.com/uploads/1/3/2/7/132741064/bokuxawoguxe.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/1/0429/7788/6367/files/vuwajabusafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/47953642899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ximulomonarosaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3826/8827/files/13737594995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0084/7780/files/aerobic_biodegradation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2986/2312/files/copy_file_path_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/1852604828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/calibration_definition_as_per_ich_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4524/8407/files/learn_accounting_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/xajaguxizuzezojikaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/case_studies_in_abnormal_psychology_levy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/vefuf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DD 4996 bytes
SHA-256: fb2275ea11f587644be64543be1aa5da77f9b21a652b2f83df989826e8a8a61b
font_01_sfnt_off000092c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C0 10360 bytes
SHA-256: f3124b25fa38fb1871715d81f719e9017d9d908231133e40fb011021dfde0a7e
font_02_sfnt_off0000b65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65E 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3