Malicious PDF — malware analysis report

Static analysis result for SHA-256 182771be8200585b…

MALICIOUS

PDF

33.6 KB Created: 2020-08-25 01:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e3c1301ce5cfb44ba05b9c0816ca60c3 SHA-1: cdab92fdf726fcb18e3acc75fb60b0d3e0b8dfbc SHA-256: 182771be8200585b4d81c00da9ffde0bd735e2b8d3f9cc1d0c7713a045f72ed9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains text related to 'piano sheet music' and a malicious URL, suggesting a lure for users seeking specific content. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL supports a phishing or scam attack pattern.

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=mercy+brett+young+piano+sheet+music In PDF document text
    • http://files.transactionbankingacademy.com/uploads/1/3/0/9/130969879/debetosedov-goguwafemavijur-vogupevewemelo-kevomerasedos.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/1/0448/0316/2269/files/makenowumatonepipaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/41938041176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/57451700911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/97329917035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/51546541038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0269/1743/files/posix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/53613987374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/83644014119.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 4

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_off00004544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4544 5564 bytes
SHA-256: 1e231d8fa4c8de2a991cb9075d748329a9913edd3a076f5bb6016fe9a9cb8e9a
font_01_sfnt_off0000580e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x580E 9932 bytes
SHA-256: 6f307314505081b29658c525fec1cf8cb6cc25f94e23c811273d339c84da7a71

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