Malicious PDF — malware analysis report

Static analysis result for SHA-256 274b1d33c7b32065…

MALICIOUS

PDF

57.1 KB Created: 2020-08-08 02:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a169359e922f8f9caab8f58143187e38 SHA-1: bae9911edec8b0290f6d6db335df61bc5160980f SHA-256: 274b1d33c7b320658fc1d00435c374ccfa083360900a9d3be834beb73354b5b5
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a primary redirector URL identified as malicious. The document body, though partially garbled, contains text suggesting it is a book PDF, a common lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a probable attempt to drive traffic to malicious sites or distribute further payloads.

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=eduard+pernkopf+book+pdf In PDF document text
    • http://files.darkfableminiatures.com/uploads/1/3/1/4/131482931/wesanoxovor.pdfIn PDF document text
    • http://files.blackberrycreek.org/uploads/1/3/0/8/130813837/veletigowek-pefigojinosifim-zafokozeve.pdfIn PDF document text
    • http://jebujisi.meganartandphoto.com/uploads/1/3/1/4/131409200/wozimet.pdfIn PDF document text
    • http://files.tejeshpradhan.com/uploads/1/3/1/3/131398019/fb62b.pdfIn PDF document text
    • http://files.atomicnature.org/uploads/1/3/2/6/132682778/5c163b.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/1/0431/2442/4853/files/41800176464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/74498871063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0407/5933/files/dododevefexugoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/keketokogulujamafawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8810/2051/files/chief_keef_emojis_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/nimes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/29859931607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2829/9427/files/pomejapatoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/77945998824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/vebavibotokiwesafelugex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8107/1782/files/mutagoziwidunupasafelan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/introductory_stories_for_reproduction_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/rawinakujadowavorudik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4993/4231/files/velew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1019/4582/files/blacksad_juego_de_rol_descargar.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000bd0b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBD0B 17540 bytes
SHA-256: 496cbf204c38d00248eb03611f743bb5cbe8437d7a7195304baaf21819bddb1f
font_00_sfnt_off000088d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D6 4984 bytes
SHA-256: 4c8cceb1d262b07c65ce721ad54586ae39586e61b04a0611e6f06e81d8d124fb
font_01_sfnt_off000099da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99DA 10220 bytes
SHA-256: 1079ca7f05ac3f9cb8c99e100e0a6c40e4ac09c41be394f6515f9980223c71f7