Malicious PDF — malware analysis report

Static analysis result for SHA-256 8def57dcb5d30e68…

MALICIOUS

PDF

40.5 KB Created: 2020-08-15 20:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 489d7455bb8a2baab2c2bc310cb0c5de SHA-1: 0a7ef306bfdc9a17d0cf415ae1277b46a38b5004 SHA-256: 8def57dcb5d30e683908b7c59414e353ebc20f34751d1270136bb6a1cb352402
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. The primary malicious link, https://ttraff.cc/wb?keyword=respironics%20cpap%20machine%20user%20manual, is identified as a malicious redirector. The document body, though partially corrupted, includes text related to a 'respironics cpap machine user manual', suggesting a lure to disguise the malicious intent. The presence of numerous links and a malicious redirector indicates a phishing or scam attempt.

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/wb?keyword=respironics%20cpap%20machine%20user%20manual In PDF document text
    • http://files.ps128m.org/uploads/1/3/0/9/130969654/4931345.pdfIn PDF document text
    • http://vowegased.moysmovies.com/uploads/1/3/1/8/131856772/fajigibalu.pdfIn PDF document text
    • http://files.andyknappmusic.com/uploads/1/3/0/9/130969954/basuk_fidajuxe_najabalidigexe.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/1/0433/3892/4181/files/42154489281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/vewapukozudamugapofanibeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0891/7657/files/43246093078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/74662378065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/67574328010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/41716301418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1614/2491/files/abdominal_perineal_resection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/how_to_be_a_good_writer_and_speaker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/54773257483.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_off00006182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6182 5180 bytes
SHA-256: a819ab007e25294bc58047e9647b24fb7e3b34bb9663df74e630451716f0394c
font_01_sfnt_off000072f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F3 10096 bytes
SHA-256: ab2e6f21de19c0c8a3823da9af4b6234893137466da3cc7d74a5f41b550b5102

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