Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b93a26ef9bd414…

MALICIOUS

PDF

44.7 KB Created: 2020-07-30 20:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a193460a4e62b0642313ca4ca7f6dac3 SHA-1: 783f431e30f32f0762da5fb5de78a4cf3e1cb230 SHA-256: a7b93a26ef9bd414391c3fba8ac654a1cd266dbf6c74beacce0ec503f403223f
234 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'baixar pdf creator gratis', suggesting a lure for users seeking free software. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to drive traffic to potentially harmful sites.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=baixar+pdf+creator+gratis In PDF document text
    • http://files.thomfogartypresents.com/uploads/1/3/1/3/131382673/a41f75a030.pdfIn PDF document text
    • http://files.kmarcus.net/uploads/1/3/1/1/131163683/livunaludekebelozu.pdfIn PDF document text
    • http://files.cardenhomebuilders.com/uploads/1/3/2/6/132695575/rupexupo.pdfIn PDF document text
    • http://files.wethersfieldwoolfarm.com/uploads/1/3/1/4/131454620/zodijisevebefa.pdfIn PDF document text
    • http://files.katieandnatey.com/uploads/1/3/0/7/130740325/juzigakegub-kidowelogixi.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/1/0434/7261/7637/files/bixewunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8038/3653/files/fisomeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/kodovisofuzexanesabenawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1695/3751/files/58817964061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3666/3208/files/dusepizagij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/bilelematewatafodaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/73550040959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/83048952495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3066/5637/files/duxorer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/96399997527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/tubutitofevepojorivikene.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_off00006f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F92 5092 bytes
SHA-256: cffc3f9a8e3a6e031f43c4247b73783851abe347a88ae507bbe41a869f1ad3ea
font_01_sfnt_off000080f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F9 11396 bytes
SHA-256: bba5823809d59ee765bf5166a783487b6ce1da22c5b08c538c15e7d78650be90

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