Malicious PDF — malware analysis report

Static analysis result for SHA-256 a83de9e06ba2d8d8…

MALICIOUS

PDF

56.2 KB Created: 2020-08-08 12:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 381fa747d7c28d451dc58f07ad5c6609 SHA-1: e908def3ce640765b9f4bfe386154e0f4194fbb7 SHA-256: a83de9e06ba2d8d88b68ac4f1fd2feae0c0e48ab74767065bff97b571fddcef2
202 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'free download' and includes the malicious URL. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The primary malicious URL is https://ttraff.ru/pify?keyword=yayati+kadambari+pdf+free+download, which is used to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=yayati+kadambari+pdf+free+download In PDF document text
    • http://tugup.pawsomewalksnj.com/uploads/1/3/1/6/131606490/jipolamudoborot_luwibezomiw_vofivotel_nubibeb.pdfIn PDF document text
    • http://files.silvertonffa.com/uploads/1/3/2/6/132681823/8986c79ca.pdfIn PDF document text
    • http://files.castronovobridal.com/uploads/1/3/1/6/131637224/rivalegipi_batufarikobi_guvazuz_bedamulovak.pdfIn PDF document text
    • http://files.pyppewithandy.com/uploads/1/3/2/3/132302907/9f995.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/1/0438/3942/2624/files/southwest._com_check_in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/exercices_corriges_d_atomistique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0696/8483/files/muxutufigiraxarix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6728/4383/files/3701961569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1544/4379/files/free_hidden_object_games_no_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/86365608670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/muzubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/gomaxisirimifagiror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/60721695691.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 4

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
stream_005_off0000b79f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB79F 8468 bytes
SHA-256: 5ac4734ff8ec283b7e3b854f11428de0f63d23b4bde92961cc6dac9aa7020e71
font_00_sfnt_off00007494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7494 5368 bytes
SHA-256: f081a705c7fe01f99fadee7971dc78a86b90b5db4fff2351aab481be911b94e6
font_01_sfnt_off000086d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D9 15696 bytes
SHA-256: a4e21cafde7bd7024f17265e8e769c7aed28d6799b7e83f4e4e1ca54f81051b8

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