Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a3bfb6889343c5…

MALICIOUS

PDF

35.1 KB Created: 2020-08-17 06:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c4b72c08be1fae74a132afa6f97d3104 SHA-1: 2cd7e9c19385ff55841e998b4e255e1dfa140e3f SHA-256: 01a3bfb6889343c5a623043893c0af78cecd8f1f8f886d784c646d5d8885fe4e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt disguised as a free download. The ML classifier strongly suggests maliciousness. The primary IOC is the redirector URL, which likely leads to a malicious payload or further phishing content.

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=brothers+movie+song+sapna+jahan+ringtone In PDF document text
    • http://lowim.instituteforeap.com/uploads/1/3/0/7/130738524/19ea104.pdfIn PDF document text
    • http://files.gersongirls.com/uploads/1/3/1/4/131453894/8158a2b16cbbd.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/1/0434/9696/4261/files/fejifafexirevogugirel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/22048450103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/bluestacks_ad_skipper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/5049567971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/16383154737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/pubuvafidozumejibapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/96026549258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/unfair_dismissal_appeal_letter_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3001/9237/files/aphasie_globale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4852/6246/files/tuvawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1164/4324/files/islamic_banking_system_in_nigeria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2511/1972/files/jenidixawamikom.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 2

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_off00004bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF0 5384 bytes
SHA-256: a0b1ff9c100789641361a728e95caf47e6d8f5d93a55339df8d0fab8a86156c0
font_01_sfnt_off00005e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2E 9764 bytes
SHA-256: 4ab828b58eebf9e29e17ad4a44d88a6ad6fc2324b9d6dd1d22dd4504a1782fe0

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