Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da739426213bcf4…

MALICIOUS

PDF

40.7 KB Created: 2020-08-22 14:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a198c8699824dea01b1971ea465131c SHA-1: 8a1968766a9ab823d0d778d1b371a6a5976c898c SHA-256: 4da739426213bcf40870d2842c0736e91396c81ba02a0ea76aaede1aa9fec2f2
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to a 'Vietnam consumer finance market report'. The PDF also contains a link farm heuristic, suggesting it's part of a larger SEO poisoning effort. The primary attack vector is likely social engineering via a malicious link embedded within the PDF.

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.cc/pify?keyword=vietnam+consumer+finance+market+report+2018 In PDF document text
    • http://files.italianstore.com/uploads/1/3/1/8/131857758/juwalumabo.pdfIn PDF document text
    • http://files.biographyofanobody.ca/uploads/1/3/1/6/131637658/1253665.pdfIn PDF document text
    • http://rasaz.cheerequity.org/uploads/1/3/1/3/131384401/siron.pdfIn PDF document text
    • http://files.ucra.us/uploads/1/3/2/6/132681479/5986284.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/1/0433/0687/7080/files/muxajuvorupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5769/2315/files/68125330769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5517/6097/files/1959743551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/woh_pehli_baar_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9164/7894/files/laryngoscope_journal_author_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/rudodopufezizon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4025/0775/files/platform_bed_mattress_full_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2658/7549/files/manufugame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2045/7883/files/18635294612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2250/8454/files/padipinog.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_off00006020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6020 5680 bytes
SHA-256: 3acfc48693eb6c6b0f4f5d35eeb72a37fbd89fd40e678abc216f318dfbe00fd3
font_01_sfnt_off0000736b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x736B 10132 bytes
SHA-256: 6597b5b12d0ea912b1edfe961498577cf61f5918a34acf7d186196098f4f8ae2

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