Malicious PDF — malware analysis report

Static analysis result for SHA-256 44748240bacf9b6f…

MALICIOUS

PDF

47.1 KB Created: 2020-08-21 07:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1344c8d11d4bca63221a3a704b1a4d7e SHA-1: 3686395384925fa4069c365159388032b13fd0da SHA-256: 44748240bacf9b6f5173a9d30afee48827aad57b4787dbc53705db3309c113b3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to mimic legitimate study materials, specifically for 'CBT nuggets aws certified cloud practitioner'. The primary malicious link, https://ttraff.cc/pify?keyword=cbt+nuggets+aws+certified+cloud+practitioner, is identified as a redirector to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous embedded URLs further supports a malicious intent, likely for phishing or malware distribution.

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=cbt+nuggets+aws+certified+cloud+practitioner In PDF document text
    • http://files.saintalphonsusschool.org/uploads/1/3/1/8/131857071/b41fba5.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/1/0438/7245/2776/files/88009515973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/6533890560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5818/2809/files/morfologi_ageratum_conyzoides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/92139430552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9090/2166/files/soguvase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1509/2893/files/1980_ford_f100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0925/3286/files/25939733327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/92389968470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2454/files/38765866903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2869/9553/files/capital_market_magazine_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3825/2957/files/ccna_2_chapter_4_exam_answers_2018.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_off0000781e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x781E 5460 bytes
SHA-256: adc9f3cf7aa403d1d7b4cabb54c10b0dfeb47104053a7fe412f9639d80e72f7b
font_01_sfnt_off00008acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACD 10732 bytes
SHA-256: 5b381eb4b3ac792213798ad3e71c39ca46a02012cbb45022a73560cabdc3ee52

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