Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bac4dfc138435ff…

MALICIOUS

PDF

45.5 KB Created: 2020-08-19 03:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c56521ee7a551725f4693a44660442a SHA-1: 45455ee834c9f5fd1e70f4740b7e47e9e68bea8d SHA-256: 5bac4dfc138435ff41a84874864cbb655017182811f6fdd0d7d563b5230eacc5
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that leads to a known malicious redirector. This indicates a phishing or scam attempt designed to lead users to 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=proposal+skripsi+akuntansi+biaya+pdf In PDF document text
    • http://durel.sansburymedical.com/uploads/1/3/1/1/131164366/5818276.pdfIn PDF document text
    • http://files.lbcmetz.com/uploads/1/3/1/8/131872298/aa97019af1abc1.pdfIn PDF document text
    • http://files.luskccmaths.com/uploads/1/3/1/3/131379833/zikinitewatizoj_xitukok_xijuvitatu_joxut.pdfIn PDF document text
    • http://files.greenwichinternationalpreschoolkinder.com/uploads/1/3/2/6/132695248/e711a.pdfIn PDF document text
    • http://files.oldhamwayultra.co.uk/uploads/1/3/0/9/130969330/zidodozeleponet.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/1/0433/4295/4650/files/55425818239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/pasidoxevogurebasusop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/rogipubuzilorav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/85010992514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/72218710217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/lake_amador_fishing_report_november_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8493/8390/files/31864945401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/dalikikakimotipobemoruja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/riesgo_cardiovascular_framingham_2020_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/2812/3545/files/42093133952.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_off00006575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6575 5108 bytes
SHA-256: b0761deeba70d62e6d56917059c2349b101dcb952ac42c6d7c91c03d75220fd4
font_01_sfnt_off000076d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D4 11348 bytes
SHA-256: fe2bb3b9d730aa684c718f97813a4c25922735323f783ece2b3bc775a5a6d161
font_02_sfnt_off00009b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B34 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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