Malicious PDF — malware analysis report

Static analysis result for SHA-256 79dc4f1713930f4d…

MALICIOUS

PDF

221.0 KB Created: 2020-08-06 10:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e1b44afc27dd7a1598dabe8fe31f611a SHA-1: f5e744356a17f14292a297bc842665937369f70b SHA-256: 79dc4f1713930f4dcbd0d4dd6c25cc55eb8e60ea3955a0dc4a33741769213cb2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a malicious domain, identified by heuristics as a redirector for phishing or malware distribution. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary purpose is to trick the user into visiting this malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.ru/pify?keyword=best+definition+of+artificial+intelligence+pdf In PDF document text
    • http://roriso.huskybands.com/uploads/1/3/0/8/130874330/menafumemulox.pdfIn PDF document text
    • http://files.progressotech.com/uploads/1/3/0/8/130814423/0b9b8d3aa.pdfIn PDF document text
    • http://files.zenmethodphilly.com/uploads/1/3/0/8/130873810/e54cdcee7cdb5.pdfIn PDF document text
    • http://files.cookwithjames.com/uploads/1/3/0/7/130739340/8638391.pdfIn PDF document text
    • http://files.laziboycarwash.com/uploads/1/3/1/4/131483149/b7c7fa46.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/1/0436/1663/2992/files/leon_plus_anesthesia_machine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5592/3878/files/how_to_torrent_without_isp_knowing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5976/4634/files/harry_chapin_taxi_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5344/8358/files/64005535631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/97943327079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5963/3559/files/bimepufufuvakebivilis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2778/4095/files/no_reply_at_all.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/feziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/95838408783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/disademibupaleg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/litelogawow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7508/3167/files/shake_it_off_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/jutuguf.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
🗂 Part of campaign: cookwithjames.com 4 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00031430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31430 6828 bytes
SHA-256: 2afea478da8ab4b2518723b5b513920eac1d8206ea640eb7dbf9d8685678349d
font_01_sfnt_off00032b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B4D 5372 bytes
SHA-256: a143196748d4b3469113d2255c3611a6e15823c4d9d838b2b7aa1bbc97675191
font_02_sfnt_off00033da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33DA7 11400 bytes
SHA-256: 9080788e697aa10785b880f5deee2e1cec7f215e3de6b9608199a92a68a1c302