Malicious PDF — malware analysis report

Static analysis result for SHA-256 1daf5817caefd7cc…

MALICIOUS

PDF

71.3 KB Created: 2020-08-23 05:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a0da1cbf6f16247e6c89c8a66ca9163c SHA-1: e81368aa17b87a24ff22f791f1c86fdad306bb91 SHA-256: 1daf5817caefd7ccb2a8942c01b6be825dbae185faaf062b62ed9756de44a589
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to the presence of a redirector link pointing to 'https://ttraff.com/pify?keyword=acidosis+tubular+renal+pdf+2018'. This indicates a phishing or social engineering attempt, likely to direct the user to a malicious site. The file also contains a large number of external PDF links, suggesting it's part of a link farm for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the embedded URLs and heuristics strongly suggest a malicious intent to redirect users.

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.com/pify?keyword=acidosis+tubular+renal+pdf+2018 In PDF document text
    • http://wevux.blueridgebarassociation.com/uploads/1/3/2/7/132740494/26ec681ae55.pdfIn PDF document text
    • http://files.koala-corp.com/uploads/1/3/1/1/131163514/zaxulaker.pdfIn PDF document text
    • http://files.son-riseranch.com/uploads/1/3/2/6/132681767/gadobozamanaxal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5906/7550/files/23775128714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5650/3707/files/the_middleboro_casebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9306/5881/files/el_arbatel_de_magia_veterum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7231/4778/files/android_bitmap_xml_attributes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/vinakimapasitado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/trayectoria_del_nervio_vago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/john_deere_260_skid_steer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/45814707256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3844/8548/files/39891146753.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F7 5680 bytes
SHA-256: a8bf4ff96ff079c70adb2998e5d54d187c6cbe1c7a95fdc454cb363d1437d25a
font_01_sfnt_off0000d948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD948 12680 bytes
SHA-256: 1de9209adf36cebae5c985dc2b1f73eed67dd4968df5603cb8425f55c49d58b9
font_02_sfnt_off000101e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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