Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf959b394210865…

MALICIOUS

PDF

40.4 KB Created: 2020-08-19 12:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 49412df29adf561236e60494c23f74ea SHA-1: 4fc87387c3dae1a04c98bb07ae27e3c2027862dd SHA-256: bcf959b394210865cc456fc4e44c4947f0f3ef09fc1b5f99628564244c82e1e5
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Samsung latest android version' and includes the malicious URL, suggesting a lure for users. The presence of a link farm indicates an attempt to manipulate search engine results or distribute malicious content widely. No scripts were extracted from this sample.

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.ru/pify?keyword=samsung+latest+android+version In PDF document text
    • http://files.enfieldrefugeewelcome.org/uploads/1/3/2/7/132740234/ad6b7ce8eb8d9.pdfIn PDF document text
    • http://files.annecrylen.com/uploads/1/3/1/6/131637385/acd2f60701.pdfIn PDF document text
    • http://tusiwuti.missvietnamofamerica.com/uploads/1/3/0/8/130813528/koguvenefarifodoju.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/1/0430/7720/6165/files/povagifepakizawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7106/8565/files/tosofamorutepebox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerisorajomowuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4975/2478/files/gokutezar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/sutagugadavinulelov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/1443881575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9391/5800/files/9812828584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2122/8440/files/marvel_comics_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/3x3_matrix_inverse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/dizoxesozu.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 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_off000060a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A9 5308 bytes
SHA-256: 3c17a3b78637ea9234503e9592b29c396a57a02358625fc7b1021227973c7496
font_01_sfnt_off000072a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A1 10128 bytes
SHA-256: 8b486cfe34715118a068c30c28748517dab55a3b80d2fff6a749f73677910efe

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