Malicious PDF — malware analysis report

Static analysis result for SHA-256 581370dbf98d9545…

MALICIOUS

PDF

271.4 KB Created: 2020-08-11 13:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 94b9a1b146808369611368e927bd9432 SHA-1: 3b5f96e90ef5e15ae5033e966a9894334b4e4381 SHA-256: 581370dbf98d95458b948dcab0825074a99650370fde26192b8d1aaff8aebef5
134 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL, https://ttraff.com/pify?keyword=pdf+of+beta+distribution+of+second+kind, is the primary indicator of malicious intent. The document body, though heavily obfuscated, also contains this URL, reinforcing the redirection attempt. No scripts were extracted, limiting the analysis of further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • 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=pdf+of+beta+distribution+of+second+kind In PDF document text
    • http://files.evansadopt.com/uploads/1/3/0/8/130874122/fedd98c1a86.pdfIn PDF document text
    • http://vuxef.bcmeccanomodellers.com/uploads/1/3/1/3/131398560/1107963.pdfIn PDF document text
    • http://files.rearfacingtoddlers.com/uploads/1/3/1/6/131637814/4336359.pdfIn PDF document text
    • http://files.yoursevenproject.com/uploads/1/3/1/3/131398123/fowodugifiz_memode_danaluwijorosol_jowifiri.pdfIn PDF document text
    • http://kemavomip.themuddybearcat.com/uploads/1/3/0/7/130739826/denine-xozazizoxaw.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/1/0431/8396/4324/files/64484773391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1482/2811/files/21862138563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/jixidukekaxalilos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0949/7496/files/1782169103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1395/6006/files/lowrance_hds_9_gen_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/calligraphy_lessons_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4336/0663/files/westlife_my_love_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7706/6145/files/ali_ibn_abi_talib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/metipasovinumibuxenivez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7124/2389/files/am_law_100_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7423/8102/files/57417514424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/54388430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3075/4966/files/daxonafesodadetilo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003c984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C984 5188 bytes
SHA-256: 1ac3b9dfab3671c181be309124f657a9d9425b2367a239243eb4a010fef3e530
font_01_sfnt_off0003db37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DB37 19808 bytes
SHA-256: 25010f800a4b0eacfa61d4a581717e635a709603826e9b2141097aedc40754b2
font_02_sfnt_off0004192e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4192E 16384 bytes
SHA-256: 068eefa0e2d2a1b97109382a04fda4a0cf858744f8e52751cfcb01cbe853dfdf