Malicious PDF — malware analysis report

Static analysis result for SHA-256 8160cd670ceb65aa…

MALICIOUS

PDF

56.5 KB Created: 2020-08-06 01:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f52426c35ac6e255f15c68ec00f19451 SHA-1: 68dfacab3350aec31a243f6d48cb3a7008fe3b0a SHA-256: 8160cd670ceb65aa82ea9c188aec0872a9305b1ab373e658881dcd274e8c1d95
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external resources, masquerading as a reference document. The primary link, 'https://ttraff.cc/pify?keyword=arm+compiler+toolchain+assembler+reference+pdf', is identified as a malicious redirector, indicating a likely phishing or malware distribution attempt. The presence of a large number of SEO-optimized PDF links further suggests an attempt to manipulate search engine results for malicious purposes.

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=arm+compiler+toolchain+assembler+reference+pdf In PDF document text
    • http://files.southbeacharts.org/uploads/1/3/0/7/130739239/mifabapinikoxuziles.pdfIn PDF document text
    • http://files.exclusivedancerecruitment.com/uploads/1/3/1/4/131436967/4351360.pdfIn PDF document text
    • http://files.mightyscholarspreschool.com/uploads/1/3/1/1/131164488/5486528.pdfIn PDF document text
    • http://files.hr-safetysolutions.com/uploads/1/3/0/7/130740260/wamuwixulesalifadodi.pdfIn PDF document text
    • http://files.erikajuran.com/uploads/1/3/0/8/130874328/3316821.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/1/0431/6954/6395/files/65331352736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1856/7335/files/88878822338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8460/1758/files/pubopowuxeweloru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/push_git_to_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3727/7855/files/39716890676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/parasitologia_humana_david_pereira_neves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/jekiribepok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3501/7884/files/52291777690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/88890662392.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_off00009aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA3 5524 bytes
SHA-256: 0cac0dd53bcfa4bb87449c157988eacd8b45f8ff3aca7febf669e8189a027868
font_01_sfnt_off0000ad37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD37 12124 bytes
SHA-256: c3175c4a722725ce07989ed896332dbcf76818503d4825c8692e5b24ba0a5dee

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