Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d53caf34c082e51…

MALICIOUS

PDF

37.3 KB Created: 2020-08-25 06:39:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c9cfd0920f96e77fe4868271b46cbe1 SHA-1: 0e806512772897fcb5ff462560e9bb5a06f08f4f SHA-256: 2d53caf34c082e510445a962a49e317e6045f4130fca7c24d9dada4dbf896990
162 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with a critical heuristic firing indicating a link farm designed to manipulate search engine results. One of the primary links directs to a known malicious redirector. The document's content appears to be obfuscated or corrupted, but the presence of numerous external links, including one to a malicious redirector, strongly suggests a malicious intent, likely for SEO manipulation or distributing further malware.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=sphax++1.+8 In PDF document text
    • http://files.shoptwothreefour.com/uploads/1/3/0/9/130969633/fugasiwelab.pdfIn PDF document text
    • http://wugaguno.stpaulnechamber.org/uploads/1/3/2/8/132814930/ea0357ca3ba80.pdfIn PDF document text
    • http://sobitef.deeperwaterscounseling.org/uploads/1/3/0/8/130814448/wovowokobenajiwiri.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/1/0433/0687/7080/files/lekerumukin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0817/8845/files/mopobodinobovabolarefax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/85900723996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3528/6943/files/2005_lexus_rx330_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9099/2549/files/68599046422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/46643570785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6305/8333/files/wusajazaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/66268437835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7709/7886/files/vekixinilab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2512/9894/files/15845188754.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_off000054a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54A6 5048 bytes
SHA-256: 1972c55f0f26ef6c04e572c691fe770b57b55531000edf7c94a30d059f182a12
font_01_sfnt_off000065e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E3 10236 bytes
SHA-256: d7b05c577a540cd0296eb07dfd4864db1a6a4f8203f528dd3cacccecca4a4f4e

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