Malicious PDF — malware analysis report

Static analysis result for SHA-256 391bdbcb58269ef6…

MALICIOUS

PDF

38.2 KB Created: 2020-08-24 23:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6730c6bbeaf58749f47108914488bcf8 SHA-1: c88726e8428e55ff012d37201a06e22483d7cc5b SHA-256: 391bdbcb58269ef6467c8afb73674f0ddf23b52bfa844498713001f299b5c92d
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning attack. The document body contains garbled text but includes the malicious URL and a benign-looking PDF filename, likely intended to appear legitimate. No scripts were extracted, but the presence of the malicious redirector and the link farm structure strongly indicate a malicious intent to drive traffic 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=biopsicologia+definicion+pdf In PDF document text
    • http://tudepoguf.locksmith-plumber.nl/uploads/1/3/0/7/130738638/7083379.pdfIn PDF document text
    • http://nedisowig.nineonefiveapparel.com/uploads/1/3/1/3/131379578/nisenakamukesolap.pdfIn PDF document text
    • http://files.ahhs60.org/uploads/1/3/1/3/131379343/sazububuzuma.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/1/0435/5060/5461/files/16822019250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/keep_mac_from_sleeping.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1606/1091/files/pusagekugowizivudovidot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/pulawor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/57927286062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/definition_of_authentication_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2639/8888/files/mivebelijipifiwigozinexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/free_factory_auto_repair_manuals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/husqvarna_yth2348_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/gogutiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2344/0804/files/monemoraxuvifoxik.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 3

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_off00005a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A25 5276 bytes
SHA-256: 01a218e5ca32a33d0bac4d6bb407b904938f194891c8cd54d6cb6b8a2a2992e2
font_01_sfnt_off00006c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C22 9416 bytes
SHA-256: ed09982493e7d91b3f7cac3fb6310ae814f66e7ccd54189c660383c62d4158b8

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