Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f71e7bba60fb01…

MALICIOUS

PDF

61.7 KB Created: 2020-08-01 22:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d9de2c56a9d8badd9f1adf2f722c9ac SHA-1: d7592447864c2a16b68e1c9db0d839c2a5ec416a SHA-256: 38f71e7bba60fb01000e8f91f1d077c7491918f2241a3987c3fe10703954c755
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.ru/pify?keyword=vpython+magnetic+field', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted, limiting the analysis of further execution chains.

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.ru/pify?keyword=vpython+magnetic+field In PDF document text
    • http://files.wycombemcctrials.com/uploads/1/3/0/8/130814115/5425621.pdfIn PDF document text
    • http://files.ourvillagefarmacy.com/uploads/1/3/0/7/130775707/ganuxoxunefezow.pdfIn PDF document text
    • http://files.rbcdublin.org/uploads/1/3/1/1/131164063/2863635.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/1/0437/7460/7514/files/34762960445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/kiroboka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/gozovovixaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/robuserukedudopuvawuput.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/70702032498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4570/7166/files/68096145683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4645/8776/files/36488383529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/wheel_horse_312-_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4007/0042/files/ponefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1383/2857/files/rujevirakezejupuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4323/9589/files/degivimorugelilevele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/19713545115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/nojugufudaruku.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_off00009c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C40 5152 bytes
SHA-256: e02fb70f461cc2deba744f8a041148059bc26f42e328a6a673a99fae65502169
font_01_sfnt_off0000ad9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD9F 14536 bytes
SHA-256: 50e8a20d55a4a946e6d3feb8c6071df2dc5d81ab2dbc77cb998aa5728efc8507
font_02_sfnt_off0000db9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361