Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a1d8354fdc8033…

MALICIOUS

PDF

40.9 KB Created: 2020-08-04 19:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bd66365ebf2edefd6a23c2e9c79188b0 SHA-1: 0fb18f64d6b489fcfe54e1a4adf57ef7722fe6e5 SHA-256: b2a1d8354fdc8033b9c416c933c5ba4959f0e8d8af573ef382f70b09a91035a2
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a link to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to academic performance and the wkhtmltopdf tool, suggesting a lure to disguise the malicious link farm. The primary intent appears to be directing users to potentially harmful websites.

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=factors+influencing+academic+performance+of+students+pdf In PDF document text
    • http://files.businessmanagementib.com/uploads/1/3/0/9/130969985/pivurewi.pdfIn PDF document text
    • http://files.brightchildcdc.com/uploads/1/3/1/0/131070144/4246151.pdfIn PDF document text
    • http://files.americanpolicenews.com/uploads/1/3/2/8/132814147/japemebebogotis.pdfIn PDF document text
    • http://files.thetruthstandsforever.com/uploads/1/3/0/8/130815437/vubapatemumojuva.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/1/0431/7511/6961/files/47318277067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/59092179664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2430/2759/files/vopivoletigip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/jagatujafajurasigimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/nukorejivolefomuzalimezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97428896976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5306/9974/files/pdf_acrobat_x_pro_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3476/2654/files/gimegalikusitiwotorofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3416/4893/files/rujuderutotigasonafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sesolofulazige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/wufaxovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4300/4322/files/4229190248.pdfIn PDF document text
    • http://www.flickr.com/photos/alamosbasement/In 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_off00006279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6279 5432 bytes
SHA-256: 73d68dccc52f6b8015894231493b81322cbb75376037b969786222613eafcaaf
font_01_sfnt_off000074d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D9 9804 bytes
SHA-256: a984baf15621b6ef8fd2a1a205dc3cccd4b369ef2091dea5eb80b3a0f97ee74a

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