Malicious PDF — malware analysis report

Static analysis result for SHA-256 700821f430d18c27…

MALICIOUS

PDF

52.5 KB Created: 2020-08-19 05:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6e8ef49f4d8f34058691bc81513cc47a SHA-1: 70d6ed3085b022b8b2b8071656cd10ac0620f6a8 SHA-256: 700821f430d18c27e7c4c2cfc1b90eb135d58756c8547879b339ff3910ac202f
194 Risk Score

Malware Insights

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

The PDF contains a link farm and redirects users to a malicious URL, disguised as interview questions. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a phishing or scam campaign. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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.com/pify?keyword=system+administrator+interview+questions+and+answers+linux In PDF document text
    • http://files.metropolitancme.org/uploads/1/3/1/4/131453350/nesugivexik.pdfIn PDF document text
    • http://wutar.nubim.net/uploads/1/3/1/8/131856145/getolarusimub.pdfIn PDF document text
    • http://sasotokib.allstarsandbestsellers.info/uploads/1/3/0/7/130776257/2421813.pdfIn PDF document text
    • http://files.bakercityharvest.org/uploads/1/3/0/8/130815137/e287f560e5.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/1/0432/3685/1874/files/pdf_to_audio_converter_software_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9494/0573/files/joomla_e-_commerce_template_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3673/5645/files/55219522296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8959/0427/files/liberation_rosary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38692385895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9235/1907/files/50687395157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/45705792470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/loxejebidiwoniv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/9875/3448/files/8586291050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4223/3755/files/cause_and_effect_activities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/85680106685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/31982417840.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_off000087be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87BE 5520 bytes
SHA-256: 0234b27857a8440643e6868e1062dd287191830c0dc8bd3c3f8b7b4c8f00ffe7
font_01_sfnt_off00009a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A81 13488 bytes
SHA-256: 3c04756f650edc966042bcb420599ad7076e9f8853ab9400aa71058bd00a5162

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