Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efc517d5ab34739…

MALICIOUS

PDF

53.7 KB Created: 2020-08-19 11:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 39afe22d97e1f8bd122de3807e53e475 SHA-1: 29a3f9a625040adfaebeb5886f761f37dfa5ef9f SHA-256: 2efc517d5ab34739f34cedbae04a7d0daeb8c07424ec2c42a151449da3385d05
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to a 'ph lab report'. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content.

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=determination+of+ph+lab+report In PDF document text
    • http://files.everylifelives.com/uploads/1/3/1/4/131438018/9353207.pdfIn PDF document text
    • http://woper.moniquemariegelineau.com/uploads/1/3/1/3/131398102/xefupibu.pdfIn PDF document text
    • http://files.nebulawebsolutions.com.au/uploads/1/3/2/6/132696249/dexuzijolopu.pdfIn PDF document text
    • http://files.mindfulmomentsinedu.com/uploads/1/3/1/3/131398171/molobejawo-buxepugupowutix-wutefuwilum.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/1/0432/9845/5705/files/google_search_index_of.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/posevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5509/5708/files/58632829175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8279/0552/files/desmume_pokemon_roms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/76166124233.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/63983403979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0364/0984/files/alphabetizing_worksheets_for_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6382/6849/files/birkat_hamazon_hebreu.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_off00008bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAD 5104 bytes
SHA-256: 76c555e09c69adb47a4ce4fbbbd9a644aef2be58590beca54a58dcf1313cfbc7
font_01_sfnt_off00009cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD9 14736 bytes
SHA-256: f425e8d8caf4d320cbebc35fe81071d5ebaa30ffb9f96e3308c25077a0ca926d

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