Malicious PDF — malware analysis report

Static analysis result for SHA-256 87cddc2e0b873a52…

MALICIOUS

PDF

96.2 KB Created: 2020-08-08 15:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fd7d7768979846bdcb40bac403d0ab88 SHA-1: 729988d413df6573dc3f3c284f1b3ac2e28ef6c4 SHA-256: 87cddc2e0b873a52167f7c29755ac49b7b1002ab7a762cd9b2547740c6f09710
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external PDFs, many of which are hosted on Shopify and appear to be part of an SEO link farm designed to attract users searching for academic content. The primary link identified redirects to a known malicious redirector, indicating a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious intent to redirect users to harmful 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.ru/pify?keyword=bernoulli+equation+fluid+mechanics+pdf In PDF document text
    • http://temipa.modtone.net/uploads/1/3/0/7/130738848/xiwikunizape-japase-lonoxus.pdfIn PDF document text
    • http://nometiw.kristihoopes.com/uploads/1/3/2/3/132303382/sutetazup.pdfIn PDF document text
    • http://nopamus.scissorandcomb.net/uploads/1/3/1/3/131384635/5238cb4.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/1/0433/6222/2232/files/kekozurofadeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2487/5674/files/galetarupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4601/0022/files/ninufijusugemuxejinitut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9352/2587/files/44196390316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3869/3797/files/25692085479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2161/5772/files/levizoretexus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/future_jersey_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/35296413186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7586/1656/files/keremitowegupenabalevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3972/7509/files/50738827405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9721/0532/files/sedetalak.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CC 5568 bytes
SHA-256: 9e8daddce4621414a1bf16f66da3395102db4b577dcc2bb6d67fa33f44bbb2af
font_01_sfnt_off00012c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C99 15636 bytes
SHA-256: ea7da029be2f15e94cbfcb15d1c58d9d03c20dfe0155914201aa7950b065664d
font_02_sfnt_off00015e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E17 16108 bytes
SHA-256: 647fa2c693c8ab21cc25743b8708e2ebf080f540c0660d69714ab6ec7e0111fb

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