Malicious PDF — malware analysis report

Static analysis result for SHA-256 b927cfbf9a7f29a8…

MALICIOUS

PDF

44.8 KB Created: 2020-09-18 01:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f2102022585a3aafaecf7fddf744b81c SHA-1: 17edc2c2b2d4defb5bcce03dcc973b96e4c9499e SHA-256: b927cfbf9a7f29a81d29c6dfb23e579064530c3aed64649d5915af7959996242
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link that, when clicked, redirects to a malicious URL. The document body text and embedded link explicitly mention 'city mania mod apk download latest version', indicating a lure to trick users into visiting the malicious site. The PDF was flagged by multiple critical heuristics for malicious redirector links and SEO link farms, and a machine learning classifier assigned a high probability of maliciousness.

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.club/wix?keyword=city+mania+mod+apk+download+latest+version In PDF document text
    • http://files.sascwa.org/uploads/1/3/2/3/132303270/mabudag-dibukebesava-padupugasu.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/1/0432/7692/7141/files/84233577660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6077/2515/files/76182682578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6906/3836/files/75209925942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0385/3469/files/21283248690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/78485048332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1064/4377/files/47852070994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/razikeruranofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2172/8919/files/baby_boomer_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3382/9271/files/volume_of_rectangular_prism_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4567/5420/files/vomukikag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0414/8381/files/27365789793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/cereal_crops.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 2

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_off000068bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BB 5328 bytes
SHA-256: b9b42b3afeceecdc1538bf6ac47b0faf5730358381c0fd1b9119a5867866e583
font_01_sfnt_off00007adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADF 16844 bytes
SHA-256: 7ad6d7d43598396a24d0b1c8fd952e8ed7dd28f76eacbc1e958f8875a2c444d1

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