Malicious PDF — malware analysis report

Static analysis result for SHA-256 273a963b344bbd2b…

MALICIOUS

PDF

42.3 KB Created: 2020-08-01 10:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eac48672e0a5b1200b8d57e9a13e73f7 SHA-1: c545243cc1bf9fe6141426ec86760a70240c16e4 SHA-256: 273a963b344bbd2b5586b7636a375d3dddcde72b7e1fb4e41b239533adc1232d
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The heuristic PDF_SEO_LINK_FARM also indicates a large number of outbound links, many of which point to potentially malicious or suspicious domains. The ML classifier strongly flagged this PDF as malicious. The document body itself is heavily obfuscated but contains URLs that are consistent with the observed malicious redirector.

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.ru/wb?keyword=konsep%20posyandu%20lansia%20pdf In PDF document text
    • http://files.isoandbusinessexpert.com/uploads/1/3/0/8/130813797/noxodak.pdfIn PDF document text
    • http://files.thetherapyspacechelmsford.com/uploads/1/3/1/4/131406036/lapimoti.pdfIn PDF document text
    • http://files.ourladywillowbrook.com/uploads/1/3/0/9/130969680/7478728.pdfIn PDF document text
    • http://files.kellerbassteam.com/uploads/1/3/0/9/130969573/a461e221921.pdfIn PDF document text
    • http://files.orlandidancecenter.com/uploads/1/3/2/8/132815388/2a317.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3732/6488/files/duzavotinunuwofamiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6237/7113/files/yamaha_outboard_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/1787755188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/maryland_state_board_of_cosmetologists.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/fuwelofanuxigipaxer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7456/7843/files/popoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/58075280543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/zusodagujariwowizufewum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/polarekij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2F 4812 bytes
SHA-256: 7ff42eb43a4e9ee5ad1661ed666756b9a2b2f38ad4d9896946d61f3fce93b93d
font_01_sfnt_off00006ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA1 10180 bytes
SHA-256: d3f24701a58809c9b2c00ae0031131f6055d1436588ecafd8530094285c94ce9
font_02_sfnt_off00008e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5F 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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