Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3ca4a2c929427d…

MALICIOUS

PDF

47.0 KB Created: 2020-08-20 09:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 05d6fd42ec1346ccf94ec561e7228436 SHA-1: 082c02fa5e03bc20c06f314fbb1e2cce3beaf180 SHA-256: fb3ca4a2c929427deb7d0d1a13d3e1303041c516209cc3c4dfd28799c48453c1
194 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 PDF files hosted on various domains. One of these links, 'https://ttraff.cc/pify?keyword=master+business+informatics+mannheim', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting it is the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. The ML classifier also strongly indicated maliciousness.

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=master+business+informatics+mannheim In PDF document text
    • http://putavu.obsidianrenewables.com/uploads/1/3/1/1/131163774/8547438.pdfIn PDF document text
    • http://files.briona.org/uploads/1/3/1/4/131437513/5748985.pdfIn PDF document text
    • http://mesiwamad.kcldentalsociety.com/uploads/1/3/0/8/130874540/9082146.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/1/0433/7857/3464/files/nitanax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/2074/2819/files/12494176719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/old_deviantart_layout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9805/3539/files/28872298195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0261/8278/files/loxewigumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4829/4807/files/1212825564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/62198305809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4975/3507/files/fizejisolojenefulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/43243161412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/47220387043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/5098523079.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 8

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_off0000796d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796D 5236 bytes
SHA-256: 6780df2a5b1147a1c49f96d704b3c309e8a002744a9ad766da5aa2de0f1ca6d9
font_01_sfnt_off00008b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0D 10808 bytes
SHA-256: d12a87103b907b0f674ecb5dd3bcdf3c9c698b7b81cf0cb518e01080fd973ab7

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