Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd9a5a98c9d9550…

MALICIOUS

PDF

52.5 KB Created: 2020-08-16 10:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d9230c948fb5b8c7511a0b248065822 SHA-1: 88a79de99ed0e387ad92ef10ee294e1ef59d7faa SHA-256: ecd9a5a98c9d9550fb4904da4c8d418266e74129d2fb4422f8f3f488905d0cfe
194 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to lure victims. The primary malicious link, 'https://ttraff.cc/pify?keyword=amcas+application+course+classification+guide', redirects to further malicious infrastructure. The document body, though heavily obfuscated, contains the lure text and the malicious URL, indicating a social engineering attack.

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=amcas+application+course+classification+guide In PDF document text
    • http://xedilelo.webbrhp.com/uploads/1/3/2/6/132680813/35222.pdfIn PDF document text
    • http://gejuxajes.jillianabbott.com/uploads/1/3/1/4/131437850/junebifoka.pdfIn PDF document text
    • http://bezetu.thecut.studio/uploads/1/3/1/0/131070847/sujeferuwovu.pdfIn PDF document text
    • http://files.7sunsprintmaking.com/uploads/1/3/0/8/130814003/pusunegipukad_febokenikaxa_nujana.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/1/0437/9679/1456/files/zobigixuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5536/3734/files/c_append_int_to_string.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7547/7407/files/taperuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/southwest_airlines_case_study_solution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3278/7609/files/79788833053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/fewopanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4718/2759/files/goboka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/pajarulifukoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/7514063634.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 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_off00008f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F90 5464 bytes
SHA-256: 4f339f30239db3622385a31ceb2434c909b18d35112cf0bfe2ec413d6b957d14
font_01_sfnt_off0000a201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA201 10140 bytes
SHA-256: 0bfbd82c4e5d3fb2f4678fac231db3acde9ff8eb2d12a9e6b7ddbd9e013330eb

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