Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad51f2d812bbc3ac…

MALICIOUS

PDF

40.7 KB Created: 2020-08-23 16:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 287ddd8245326c5ff270dd8e7c0173b6 SHA-1: 9e35ef053fa345d78ea54eec8d28524ba7b69cca SHA-256: ad51f2d812bbc3ac82a114714eb32240a92ea5eab18b834aebe56ef5b8712840
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though partially corrupted, contains text related to 'puffin browser pro cracked apk', suggesting a lure for cracked software. The PDF also contains a large number of external links, many hosted on cdn.shopify.com, which is flagged as a link farm. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=puffin+browser+pro+cracked+apk In PDF document text
    • http://morukevat.blessedaretheythatmourn.com/uploads/1/3/2/7/132712207/771b2454abd8.pdfIn PDF document text
    • http://tezil.ninaschultz.com/uploads/1/3/2/7/132741334/3742278.pdfIn PDF document text
    • http://files.abrandex-design.com/uploads/1/3/0/7/130739490/7461733.pdfIn PDF document text
    • http://lidegex.readersandleaders.org/uploads/1/3/1/8/131856257/vezeden.pdfIn PDF document text
    • http://files.mrsfaoro.com/uploads/1/3/0/7/130776120/9016413.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/1/0432/6876/7912/files/75030203577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/pewejovefokejixosanapir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/kinurifika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9096/8729/files/xawelek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0695/1328/files/64240450414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5799/4138/files/xekerenijigefeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5507/7781/files/psychology_class_12_chapter_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4401/1168/files/97268998713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6163/1384/files/pluralisme_hukum_indonesia.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_off00005d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D32 5416 bytes
SHA-256: ee66543bce3b0efa1126014b4c21885ac52b0a89136c52f3a9a59834c90f1937
font_01_sfnt_off00006fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB0 12656 bytes
SHA-256: d6df15259c4e46802555e6baaaf34f25f25c6ec368b238e8d6d6e1475e9fdf75

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