Malicious PDF — malware analysis report

Static analysis result for SHA-256 642ea20a31275d10…

MALICIOUS

PDF

41.9 KB Created: 2020-08-01 23:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 90b50e909c1fa19a015f9436679293ba SHA-1: 5a810bcbc99840b40195191bb8619a3d41db4767 SHA-256: 642ea20a31275d10f0776b0470bfc83cf0815ec85735b8d3168fee1fbfd19aa2
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector pointing to a malicious URL, suggesting a phishing or scam attempt. The document body and embedded links indicate a lure for 'Yupptv cracked apk', likely a pretext to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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=yupptv+cracked+apk In PDF document text
    • http://files.acornoakphoto.com/uploads/1/3/0/7/130739831/fovujafunajif_fewik_ziwawuveregujiv_fufunukibezege.pdfIn PDF document text
    • http://files.theflourishsisterhood.com/uploads/1/3/1/3/131398156/95d18288fa830.pdfIn PDF document text
    • http://files.noretasdecor.com/uploads/1/3/1/4/131453007/xidusut.pdfIn PDF document text
    • http://files.ukenglishmyanmar.com/uploads/1/3/1/4/131437926/dd9a79db070b3f.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/1/0433/0687/7080/files/48177964882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3951/4006/files/25962108685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/856555789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4418/1928/files/vuzexukodew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/9332849174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/duwim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/botud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6062/5562/files/14239776373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9988/9569/files/togufavirosuvugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0003/5485/files/52804539340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/25126703484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/43980990611.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 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_off0000662a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x662A 4940 bytes
SHA-256: 2b85f04104e49f6bd9e5907a825206f3566093b3e0c9a8afa991d40739f82802
font_01_sfnt_off0000770b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770B 10576 bytes
SHA-256: 4fe0f807213691063a2134bf9b04ef8e8bb9226bf52a97389a09c2d6948ce5a7

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