Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6840abb7e8bd0a…

MALICIOUS

PDF

41.5 KB Created: 2020-08-18 19:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c1a37050223b1e2dda8f1cc96b9f13ef SHA-1: 4047c5c522d721af5fad8f6b8aec866a3590be97 SHA-256: ef6840abb7e8bd0a7b980180bc41171dd1aed20b0024282463ad4c6d7d0af2e6
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL that is flagged as malicious. The document body, though heavily obfuscated, contains references to 'Android games mod offline apk' and the malicious URL, suggesting a lure to download potentially malicious content. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination.

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.com/pify?keyword=android+games+mod+offline+apk In PDF document text
    • http://files.changethenarrative.net/uploads/1/3/0/7/130738548/19b7229c1d9.pdfIn PDF document text
    • http://files.shopkoco.com/uploads/1/3/1/4/131452938/maligosoj_dijeniwigapo_remupevupoteka_tewajetatuvere.pdfIn PDF document text
    • http://files.mylocalpilates.com/uploads/1/3/0/9/130969481/f829f52ad31f733.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/1/0430/1615/9381/files/maxisutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5373/6351/files/nidebufosepot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/46020589831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/eeo_component_2_reporting_requirements.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0662/3903/files/tufabumemos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/24073557095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/43932666079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/coordinate_geometry_class_11_ncert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3434/5625/files/nizip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2433/4498/files/26788346939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/432497642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/27299310354.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56A8 5416 bytes
SHA-256: d50cdbd610706aa5dd866555dacf5a68f9f1a26e0f6f89cdd69933136a32cc17
font_01_sfnt_off000068f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F8 3272 bytes
SHA-256: 8d9a6d499735c8dd65bf9d1232fa89e5300fa4decb25dbd5307f67c419c9d903
font_02_sfnt_off00007614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7614 10180 bytes
SHA-256: 3b99c1afc9f447ad9509637c68238d921c586e58a4cd1e43fbebe5556ad8f902

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