Malicious PDF — malware analysis report

Static analysis result for SHA-256 5161c1b60b91e770…

MALICIOUS

PDF

47.4 KB Created: 2020-08-12 19:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1e10e74f0f66eab25e2244b270942175 SHA-1: 4f8a3c317be04f2385fad654214b0e0c6e52e6b3 SHA-256: 5161c1b60b91e770b1cec679237506e834d783f28dd5378f1e00e1625cdb5e60
202 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on Shopify. One critical heuristic indicates that the document links to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=chemistry+in+everyday+life+class+12+ncert+solutions+pdf', suggesting a lure to download or view educational content that ultimately redirects to a malicious site. The presence of a visual download button further supports this phishing attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=chemistry+in+everyday+life+class+12+ncert+solutions+pdf In PDF document text
    • http://xamidorow.sevenlakessubdivision.com/uploads/1/3/0/7/130775997/9293972.pdfIn PDF document text
    • http://files.knowledgeisempowering.com/uploads/1/3/2/6/132695388/37f95f2f8d.pdfIn PDF document text
    • http://makowesi.theroyalapartment.com/uploads/1/3/1/4/131438216/6197120.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/1/0429/8155/6375/files/lelozanup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4543/7083/files/20566293719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9070/5574/files/3568697758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3663/8360/files/sprint_web_texter_plus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/32775385656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6273/8592/files/tongue_twister_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/kopizeguzepukolosinefoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/wavebazinoxufugizit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2752/8871/files/administracion_de_recursos_humanos_snell_bohlander_17a_edicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jufozigazagapuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5459/5225/files/48506145796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/26980179922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5895/3381/files/aldehyde_ketone_and_carboxylic_acid_target.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA0 5644 bytes
SHA-256: f011831406fd5887dca64600b5264a3731fc56b6d1d2792c8cf38c4c192cdfd6
font_01_sfnt_off00007dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBF 10604 bytes
SHA-256: 09b572e2a0c0ae36f77835daae38b948b72e3323a9207bd2a1e13144c513a22c
font_02_sfnt_off0000a1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f