Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ad02576798162c…

MALICIOUS

PDF

46.1 KB Created: 2020-08-06 00:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d34c5b61985af46aa2a407d77a862b6 SHA-1: 6c71e5c8d9d57acff20f02ec58adf415893ad127 SHA-256: 83ad02576798162cd803ad7dcc4b3553937338aa7daf6709135478f7b5e7fe18
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary purpose is to trick users into visiting a malicious site, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=john+tukey+exploratory+data+analysis+pdf In PDF document text
    • http://files.hcbmusic.com/uploads/1/3/0/7/130775714/nilinujewutefik.pdfIn PDF document text
    • http://files.ncclosingattorneybestpractices.org/uploads/1/3/1/3/131378780/1324396.pdfIn PDF document text
    • http://zakok.lascolinaspsych.com/uploads/1/3/1/3/131383657/bujolaf_nujibugepizi_nekexajujakig_kawixiladiw.pdfIn PDF document text
    • http://furalubi.mattclifforddesigns.com/uploads/1/3/2/6/132695492/504edee33b.pdfIn PDF document text
    • http://files.cmaretreats.com/uploads/1/3/0/8/130874254/negipa_voxamixu_tesube.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/1/0432/8977/2187/files/97586918719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6127/0935/files/ode_to_joy_violin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/mad_world_gears_of_war.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4006/6971/files/install_elasticsearch_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/zomonilutibumenodifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/elementary_probability_theory_chung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0189/5322/files/21750184909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5808/6556/files/gubujadoxuzexelebodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8935/3117/files/zemexake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/millionaire_next_door_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6881/7562/files/53071965139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/simopowonedoratosatixe.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 3

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_off000074f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F6 5352 bytes
SHA-256: e242d578f5d038c6f1f54c150e83084a8a2a6874db3d8f33096a0ff79889840d
font_01_sfnt_off00008732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8732 10456 bytes
SHA-256: 14af05a207883bbeb98680467fc55af0810a85316021a3f8212763eee03d2ec0

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