Malicious PDF — malware analysis report

Static analysis result for SHA-256 971caa42fbb74d3a…

MALICIOUS

PDF

40.7 KB Created: 2020-08-15 10:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5ec13762d614c6592d988726409d4951 SHA-1: 6bb08813d1b4e3d8069248c0a5611c5f12691242 SHA-256: 971caa42fbb74d3a5cb1bab8d485d8d2a5a496ca89832929a733012b50447739
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/wb?keyword=voluntariado%20corporativo%20pdf'. Another critical heuristic identified a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content broadly. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/wb?keyword=voluntariado%20corporativo%20pdf In PDF document text
    • http://files.rootsoflove.ca/uploads/1/3/0/7/130775108/titorovegit-mewazuvowe.pdfIn PDF document text
    • http://files.chantal-pollier.com/uploads/1/3/1/4/131482916/pewulefimope.pdfIn PDF document text
    • http://toguroxeg.timelessjourneys.net/uploads/1/3/1/6/131606346/figatamopubat.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/1/0433/7909/7758/files/94150977892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3732/2390/files/understanding_automotive_electronics_william_b_ribbens_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/xenerukumil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/medavekoziruguwag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/59562586388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/21960954335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0711/5423/files/94225446794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8391/4654/files/diabetes_mellitus_type_1_treatment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/jipiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4818/9603/files/68944524753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/56008927853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3511/3110/files/wujaladinafeka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1370/5625/files/short_term_financial_management_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/3584627446.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 7

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_off00005ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBB 4996 bytes
SHA-256: bd5adf49187f90ea09f915553e09be706ef280b09a0083035b777366f0b00be5
font_01_sfnt_off00006fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD4 11240 bytes
SHA-256: 59769a55e21c34dd3db268fb457f4589d15a95a0ea72aad3f6c7b86b44ad22dc

Open this report in the interactive analyzer, or submit your own file for analysis.