Malicious PDF — malware analysis report

Static analysis result for SHA-256 8525befdd9a25248…

MALICIOUS

PDF

45.0 KB Created: 2020-08-18 18:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f50af4d60b0060dcbae45e3353c51d66 SHA-1: f3655b60441629cebb58dc596f0b914897aeb59d SHA-256: 8525befdd9a252482443251462c5816077ad8ecf445b9bace451bf17bd85c09b
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 redirector, masquerading as a download for 'ch play apk android 4.0'. The presence of a link farm and a redirector strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and embedded URLs indicate a lure for users to download potentially harmful applications.

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=ch+play+apk+android+4.+0 In PDF document text
    • http://golus.amasignature25.com/uploads/1/3/2/7/132712207/juroponuf.pdfIn PDF document text
    • http://files.mariannemcshane.com/uploads/1/3/1/3/131383998/sedage.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/1/0428/4334/0956/files/gegafibojuwemut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7879/4920/files/65244939317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2624/3996/files/59155874859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9074/6271/files/practical_skills_in_biology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/casio_g_shock_5081_manual_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/41804053110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/lakimatefekifutatavurej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3365514284.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 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000655b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655B 4908 bytes
SHA-256: e191de08cecf087fc899394e6826c926f582e0833ce2eddf87ffefa6061c5e0d
font_01_sfnt_off000075f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F3 10308 bytes
SHA-256: dd7b42a02bb596c941c5040343b7c6a1c16b5efce626cc721485c10abaa8438b
font_02_sfnt_off00009901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9901 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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