Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac8b0a2be10f58c…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 18:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1b8c4ef12c4cbe75f501edc02cc89c29 SHA-1: f5d5fcb226c1faa8e70419cabba10698cb8d3e0d SHA-256: 4ac8b0a2be10f58c39ab0652094543990af613fb0adfc1e3f61ecc3f675b7422
162 Risk Score

Malware Insights

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

The PDF document contains a link farm and a specific malicious redirector URL, 'https://ttraff.cc/pify?keyword=blender+app++for+android', disguised as a download for a 'Blender app for android'. This indicates a social engineering attack aimed at tricking users into visiting malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=blender+app++for+android In PDF document text
    • http://files.axems.com/uploads/1/3/2/7/132740417/nunawikuvi.pdfIn PDF document text
    • http://zogoxeku.marymckschmidt.com/uploads/1/3/2/7/132710657/revadatakoziviw.pdfIn PDF document text
    • http://files.clearfieldcreekwatershed.org/uploads/1/3/1/3/131380627/c639c4ff8cacf7f.pdfIn PDF document text
    • http://files.winreducer.net/uploads/1/3/0/8/130814674/xokomezabuw_puxinomikexa_rabiligu.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/1/0431/2226/2178/files/kagobezonabisabufiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/o_fortuna_carmina_burana_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7993/3862/files/bekedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/nukuwivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6427/7657/files/bubble_letters_font_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9124/4696/files/kifiwuvazakorem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/nemufiwaduzozemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2577/6288/files/74889693160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/cch_chuyn_nh_sang_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/ayatul_kursi_urdu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/wazirurogivedulix.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: clearfieldcreekwatershed.org 4 samples

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000699f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x699F 4908 bytes
SHA-256: 526a2d618b84207fda83a53c8634f6be8e68cdcd69c8c074d01ed4dd7a831063
font_01_sfnt_off00007a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5E 10260 bytes
SHA-256: d13fa51e4e35b95065885cd7409ae359bc90527b2ec4419769daadb8ec957f86

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