Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3a1cf0f1e2b2ac…

MALICIOUS

PDF

34.5 KB Created: 2020-08-12 20:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 64bc8baf01eb406c332e62d631372fa2 SHA-1: 261168038d1dbc025b16cefc62c7d892a101867e SHA-256: ea3a1cf0f1e2b2acf3e3941a911e9fb46a658146efefff2eab0da7fb23363538
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, specifically 'https://ttraff.cc/pify?keyword=nonlinear+functional+analysis+a+first+course+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious sites, 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=nonlinear+functional+analysis+a+first+course+pdf In PDF document text
    • http://files.roymagnuson.org/uploads/1/3/1/6/131637814/japax-kokurogafo.pdfIn PDF document text
    • http://files.portclintonattorney.com/uploads/1/3/0/7/130776158/dcddfa5.pdfIn PDF document text
    • http://files.gameplayer.dk/uploads/1/3/1/4/131411688/1800786.pdfIn PDF document text
    • http://files.womensvaad.com/uploads/1/3/2/7/132740463/vemidewu_pebux_tuzodebope_fonoguzemuwegi.pdfIn PDF document text
    • http://files.portageresourceguide.com/uploads/1/3/1/6/131606644/8719065.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/1/0435/2029/5064/files/rimworld_antigrain_warhead.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5112/2842/files/13076841289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8761/7447/files/mogumudiketimabilonuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8842/9724/files/acrobat_reader_append.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/the_buy_side_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9766/7224/files/fojizadam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/building_technology_text_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/97183777341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/sda_church_hymnal_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4223/4791/files/rakipesotuzolagalit.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_off000048b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48B4 5220 bytes
SHA-256: 6ba69eb404b6936a2d130e2a69762c909b1a31084fdd726eb7e7bd8e5421f4bc
font_01_sfnt_off00005a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8D 10384 bytes
SHA-256: dda853b4ab9e3dbd07d2274efad9ac48f3a478b7e9f1f016f74662d8f4e8a02a

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