Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a71c70c9fae9eec…

MALICIOUS

PDF

44.2 KB Created: 2020-08-18 21:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d3b81a8f2f6b06cd3193671105827fb4 SHA-1: 052fefec5fdc62d4b19896a496a2a9cb4830ef85 SHA-256: 0a71c70c9fae9eec462a0633c79cd2d4e798eac988ad936d8fd7455591b91c62
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains text related to sheet music and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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=imperial+march+sheet+music+saxophone In PDF document text
    • http://files.eic-llc.com/uploads/1/3/1/4/131437513/6234631.pdfIn PDF document text
    • http://files.cldtravels.com/uploads/1/3/2/7/132740978/6862554.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6977/4750/files/nipazininiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemopijudesukofareran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/27374222694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4537/9478/files/88605257332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/minenunuvikuvajulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/vasagipil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2057/3082/files/pogirenopefazif.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5926 5060 bytes
SHA-256: e461d8f2fddcdec1332b4b5168adadfafe6b31f88506ddc439a01003b50f6e13
font_01_sfnt_off00006a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1D 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000072aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AA 10168 bytes
SHA-256: 85b812bcbc64d2e7d5431a4ee858973151b1cc2efe2d0c4f649523739ef940d5
font_03_sfnt_off00009575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9575 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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