Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13faa8a96bd0529…

MALICIOUS

PDF

43.7 KB Created: 2020-08-05 14:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 54eb09833b1533f1c4d6f609aa258fb1 SHA-1: b69549a63f43b865642447bf6afad6942ab78b48 SHA-256: a13faa8a96bd052928c5373291b5c4dcef9450b3ee578c430d1d891d6c95ff86
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though partially corrupted, includes the URL and text suggesting it is a PDF about quantitative aptitude questions for interviews. This indicates a phishing lure designed to redirect users to malicious infrastructure.

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=quantitative+aptitude+questions+with+answers+for+interview+pdf In PDF document text
    • http://files.realmofricketts.com/uploads/1/3/1/8/131856543/jogemo_lipasaxularikon.pdfIn PDF document text
    • http://files.perrodisefarmsllc.com/uploads/1/3/1/4/131438018/dojuwol.pdfIn PDF document text
    • http://files.kootenaicommunitycentre.org/uploads/1/3/1/3/131398046/1bdc46522.pdfIn PDF document text
    • http://files.shodacars.com/uploads/1/3/0/7/130775126/0a2a59f72254.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/1/0431/3061/8011/files/damukukaluzilutise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1435/7145/files/lefudik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/92093281415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/derurobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/ranuzuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/16107390933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1979/6633/files/zubajexadugezewefowaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/botititurinibil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/61868674176.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
🗂 Part of campaign: emmapickettbreastfeedingsupport.com 5 samples

Related samples 8

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_off00005ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF4 5436 bytes
SHA-256: 89289d7cc5cd1ce1671549afdd03342f1bc08d6c8c7eaabe51bd564d6af51918
font_01_sfnt_off0000727d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727D 14896 bytes
SHA-256: 580fad21926941ce92d2c05f58ea67fa041e0856b3a378cb681ec9d57b3348bf

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