Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1543f8a3a777518…

MALICIOUS

PDF

46.1 KB Created: 2020-08-02 17:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7cef7e41cce36ee86921adf91748f418 SHA-1: 0a83865fbd41d11841a640c0bc8ee8f204a5acf4 SHA-256: f1543f8a3a777518b6961d60364d24de2ab77d866e62001f9b289a86c348d555
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, masquerading as search results for specific PDF documents. One of these links, 'https://ttraff.cc/pify?keyword=physical+chemistry+thomas+engel+pdf', redirects to known malicious infrastructure. The document body is heavily obfuscated and contains a mix of text and what appears to be binary data, but the embedded links are the primary indicator of malicious intent. The presence of a link farm suggests an attempt to manipulate search engine results or lure users to malicious sites.

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=physical+chemistry+thomas+engel+pdf In PDF document text
    • http://files.aplmf.net/uploads/1/3/2/7/132740327/wemotuvejowoz.pdfIn PDF document text
    • http://files.janansiam.com/uploads/1/3/1/3/131380063/1820511.pdfIn PDF document text
    • http://files.dejadurhamphotography.com/uploads/1/3/0/7/130776516/9125049.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/1/0434/0760/5923/files/dalugekip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1596/8667/files/dugivom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/menude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27622062760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0019/1387/files/75762934277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/doxigakegovaninijiket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/21821503104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/nodibutajedewibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0917/0856/files/rapuvexaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/52755767304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7181/6358/files/40343972370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7009/5521/files/weseketirofovemomik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/kivod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6717/9162/files/69342856299.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 4

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_off00006af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF5 5672 bytes
SHA-256: cd52d3c4a1bb205399da430f681742d00bffa157b49e8ed135c9b6c6d1b75e46
font_01_sfnt_off00007e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E26 14620 bytes
SHA-256: f04b41a3d9b58513fa75686da65fedd10c90c464979113e0788b767932faf08e

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