Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc886d676692cf70…

MALICIOUS

PDF

43.1 KB Created: 2020-07-26 02:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1b2682bd4cf99650d589a23d7b50b43a SHA-1: ff90043e8cf3c4ef47d469d393fd4dff3d43e586 SHA-256: fc886d676692cf7088509fdc3eb6b89463b0019aa7bb0cfac16eea194b24c5bf
194 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, includes text suggesting a lure related to 'spy voice recorder app android'. The presence of a link farm and the ML classifier's high confidence score further indicate malicious intent, likely to redirect users to phishing or malware distribution sites.

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=spy+voice+recorder+app+android In PDF document text
    • http://files.forma550.com/uploads/1/3/1/4/131437775/valegiva-tulopikar-jelerugokenok.pdfIn PDF document text
    • http://files.shootacademy.co.uk/uploads/1/3/0/7/130775516/kuxifesupokebup.pdfIn PDF document text
    • http://files.chrisremitzcpa.com/uploads/1/3/1/4/131406234/gajifezumeno-sipisebakep-janekuxibanowad.pdfIn PDF document text
    • http://files.usczbusinessforum.com/uploads/1/3/0/8/130874544/fcf36178392.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/1/0429/9885/7891/files/16366830520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sexewagufik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xewujixamugovaginebutomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9045/0334/files/61999063034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/27466648334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/16341032271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2202/3847/files/tadijexogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/3815859294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6143/5813/files/pemivuxosewusifezun.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C92 4832 bytes
SHA-256: b41b0d1fa3710074a84174496b1a768074744d29bbe513f46680c93991bdd0c6
font_01_sfnt_off00007d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D01 10100 bytes
SHA-256: 8753e6f9b602ef377bdb2fb0c33afb5e8a61a6ffc30cf5b7f489bec7f47fa953

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