Malicious PDF — malware analysis report

Static analysis result for SHA-256 79dd5c9c43876aee…

MALICIOUS

PDF

39.5 KB Created: 2020-08-21 08:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76a02d2d9ce4cf6aec3c8b400fd55b59 SHA-1: a3467b5d7287649dbc3b4554cfcba00d2402f19a SHA-256: 79dd5c9c43876aee934b8ffb60a27e5fe3f5edf4eb63642d09feaef01b21c3bd
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious redirector, which in turn points to a large number of other PDF files. The document body mentions a movie teaser, suggesting a lure to entice users to click the malicious link. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm or SEO manipulation scheme.

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=chikati+gadilo+chithakotudu+movie+teaser In PDF document text
    • http://files.whhsvisualarts.org/uploads/1/3/0/7/130739937/470f859068ba3.pdfIn PDF document text
    • http://dobasuj.thepaintbarpaintings.com/uploads/1/3/1/8/131856257/zebodoja_xotelup.pdfIn PDF document text
    • http://files.ndsca.us/uploads/1/3/0/9/130969048/a12a8c9a3d.pdfIn PDF document text
    • http://fexurob.shelbyveterinaryservice.com/uploads/1/3/0/7/130776783/ca35eeb19b.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/1/0431/7950/7870/files/awaken_the_giant_within_you_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3925/0853/files/41567122426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7327/2998/files/algebra_1_math_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3880/8991/files/nikexemitefepaxufugiwus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/pesuwaromoxowudubotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/zevebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/repasones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0124/2022/files/lenotip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/83017666224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4267/5608/files/83925463904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3146/8951/files/zevonajufalodip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8324/2401/files/57217513904.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F85 5276 bytes
SHA-256: 8c98dc4374e19ae050bf0e1f1c317f5374af67fd1dd79c627047f679ac83d896
font_01_sfnt_off0000617e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617E 9672 bytes
SHA-256: e755aa70fd28b20505f62fecba319720317339b2c550fb24ac45624da50be178
font_02_sfnt_off000082af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378