Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e71972bc351ab2…

MALICIOUS

PDF

60.7 KB Created: 2020-08-15 04:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5575c027d4da758c84d452777feee626 SHA-1: e57273da3fd2b3f81e4c19fbec1c5f26b9ad0605 SHA-256: c8e71972bc351ab2447792e0cb83f75410b0823eb3d6011c55b0ea81e2e05a92
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a technique often used to create link farms for SEO manipulation or to distribute malicious content. One of the embedded URLs, 'https://ttraff.com/pify?keyword=freeze+peach+slices+cookie+sheet', is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is a primary lure. No scripts were extracted, and the PDF structure itself does not indicate exploitation, but rather a social engineering or redirection 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.com/pify?keyword=freeze+peach+slices+cookie+sheet In PDF document text
    • http://files.graycoolingman.com/uploads/1/3/0/8/130874627/9e8f1f36e15075.pdfIn PDF document text
    • http://files.ryanmuddiman.com/uploads/1/3/0/8/130874585/d3cbfedb.pdfIn PDF document text
    • http://jinevi.churchillpublishing.net/uploads/1/3/0/8/130814340/fe15c66a.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/1/0438/9833/9496/files/24587301273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/61036005801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/21019260172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/musigusuwekun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6544/1430/files/88714477211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6702/2239/files/mosudiwomomerujogew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1910/7495/files/anastasia_guitar_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/domuzobixidunidix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5064/5157/files/difference_between_british_english_and_american_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/95104909152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8577/4491/files/26713249875.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
🗂 Part of campaign: graycoolingman.com 3 samples

Related samples 2

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_off0000b058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB058 5088 bytes
SHA-256: 3770d6937fb698585d0b8f2e66a01166c90f2337edeb3ae23c101113cd8e045d
font_01_sfnt_off0000c1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A1 10712 bytes
SHA-256: 179b0913fd74c5d90b1fcf3403d0ccaeb07b2ddeacafc52d52b0aa9884da3d42

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