Malicious PDF — malware analysis report

Static analysis result for SHA-256 35628cabb0523fad…

MALICIOUS

PDF

53.0 KB Created: 2020-08-24 14:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8570c86d48a2a584f25748201203f12 SHA-1: 0fdf8914f65e463bc08aa8fa40dddb017bf1eb4e SHA-256: 35628cabb0523faddc21b225b922a73f28bd53da0db33c4732a0d4faebbd8539
194 Risk Score

Malware Insights

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

The PDF was flagged for containing a large number of external links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but also includes the URL that was identified as a malicious redirector, suggesting the document's primary purpose is to lure users to malicious infrastructure. No scripts were extracted from this sample.

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=dewsbury+reporter+sport In PDF document text
    • http://files.dlc96.com/uploads/1/3/0/7/130738771/poxoravenoterig.pdfIn PDF document text
    • http://piseva.totalfireprotectionsd.com/uploads/1/3/1/3/131383613/dad7eb8f3.pdfIn PDF document text
    • http://bipek.elizabethcommunityconnections.com/uploads/1/3/0/7/130740141/lokefejufasuworezese.pdfIn PDF document text
    • http://sisones.elpasomovement.org/uploads/1/3/1/3/131379678/3514404.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/1/0431/8894/5064/files/67803427105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/76809389521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8649/6415/files/honeywell_pro_6000_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1110/5191/files/gikexobudav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/puruxisigobutotemif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/xenademono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/4917/2382/files/office_2016_pro_volume_license.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/21932850646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/1946/0762/files/kikavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/vexolak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/50087102718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/76531334344.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 1

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_off0000938e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x938E 4904 bytes
SHA-256: da7a66e09743f9bcb0f771a6149a623891a0d01b2f8a7bc343c158874ec3df82
font_01_sfnt_off0000a464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA464 10184 bytes
SHA-256: 22dd75931a39648d7509320fb91745294754e487b09d2f3a8b7e9f20fd8d3ee9

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