Malicious PDF — malware analysis report

Static analysis result for SHA-256 771b97101de7d703…

MALICIOUS

PDF

116.6 KB Created: 2020-08-09 06:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6be53f2283ad1cfa6e09bf814799497b SHA-1: 7028e19c59326748197e0cf8ad19ce8cd50b1c86 SHA-256: 771b97101de7d7030cc3adc44784b952722773ae8b093d2f02c9acc796f20232
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to create an SEO link farm, directing users to a malicious redirector URL. The primary redirector URL, 'https://ttraff.cc/pify?keyword=human+activities+and+their+effects+on+the+environment+pdf', is flagged as malicious. This suggests the document is part of a phishing or malware distribution scheme, likely using a lure related to environmental studies to entice downloads.

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=human+activities+and+their+effects+on+the+environment+pdf In PDF document text
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdfIn PDF document text
    • http://files.duboiscountyhumane.org/uploads/1/3/0/7/130740069/doxezimu_daxikilewe_sosexo.pdfIn PDF document text
    • http://goruralu.wealwayswander.com/uploads/1/3/0/8/130874493/gesemunogapi.pdfIn PDF document text
    • http://files.baileybloomco.com/uploads/1/3/1/4/131453031/wijijotafu_develuj_sugelibomir.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/1/0430/9201/7305/files/berivobemelawetepoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8946/1402/files/60643343517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/lokudametexafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/kitefisijakaluriwem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8379/1526/files/22626759853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2025/4375/files/mubavofudevapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1312/3744/files/zumefeperedewojelolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9369/5395/files/nurefirunipam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0743/4142/files/lumat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0799/0169/files/where_rainbows_end_cecelia_ahern_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1780/4708/files/xonitofavirexexudupoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9243/4326/files/novez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2325/1094/files/zoxaribipusijabuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1572/4456/files/biwid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8243/2160/files/tvs_auto_rickshaw_spare_parts_price_list.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D60 5384 bytes
SHA-256: c29cca5859730cd0deb5e357a25b042492d0dbb3e8163cfe3803ab42f47bfb27
font_01_sfnt_off00019f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F83 10656 bytes
SHA-256: d48b825d4ae653b028ff0010be150c4b3fe3b2ed14e3a0f7f8f8bc574c2cd1c4