Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8fbfecb48239e86…

MALICIOUS

PDF

43.4 KB Created: 2020-08-06 01:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1e8df0ac8b1533ac6bc27ae957c01844 SHA-1: 20f710e90326cc6e7d64302b883600a882f7e8d5 SHA-256: b8fbfecb48239e86667d873f06620e1ec1fdff291c6117cf25118dda4aa7f279
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body text, though corrupted, contains keywords related to file conversion and the malicious URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious. The primary intent appears to be redirecting the user to malicious infrastructure via the ttraff.com domain.

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=online+pdf+to+excel+converter+for+large+files+free In PDF document text
    • http://files.drbonniesocket.com/uploads/1/3/1/4/131438011/4086856.pdfIn PDF document text
    • http://files.summergardenstheatre.com/uploads/1/3/0/8/130814423/lasop.pdfIn PDF document text
    • http://files.kipp3dacademylibrary.org/uploads/1/3/0/7/130776639/65aedf4ae656.pdfIn PDF document text
    • http://lusul.rosminicentrewisbech.org/uploads/1/3/0/7/130738870/d7bffdd8.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/1/0431/2412/9946/files/jixopakufadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/playbook_barney_stinson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2187/6900/files/65342366111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0688/9882/files/bofrost_katalog_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9394/0641/files/76678907824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0246/9285/files/pifufagaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/vokobilafosurunaxidekim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8674/8579/files/tekasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6117/4684/files/zanegufigatifamosi.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 6

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_off0000601d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 5264 bytes
SHA-256: 8350ee490919c036ce04078e321273bc34fb9b71b587664f179e07f846b63a47
font_01_sfnt_off0000721b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x721B 9492 bytes
SHA-256: 7832e0da4466cbf3df1a9a286902724916143fcc18dd2bf3fa861b6708504bd3
font_02_sfnt_off00009292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9292 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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