Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ff662d58236b6f…

MALICIOUS

PDF

49.2 KB Created: 2020-08-16 14:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b80170b0afe83b0a97f02773884a4de SHA-1: e53075bc392912037fc44ad9920bc7d08e1ff982 SHA-256: e5ff662d58236b6fed6e84abe8487c13b07251182c63be0cf3c822cbbb2743a0
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=akreditasi+psikologi+undip'. It also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning attempt. The document body contains garbled text but also includes the malicious URL, reinforcing the lure. No scripts were extracted from this sample.

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=akreditasi+psikologi+undip In PDF document text
    • http://files.basingstokeconsortium.co.uk/uploads/1/3/1/4/131483201/7462761f2f1.pdfIn PDF document text
    • http://files.mindfulserenityonline.com/uploads/1/3/0/8/130874629/pezozulaleku.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/1/0432/5369/4626/files/sine_taylor_series.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7654/0834/files/7984596875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/wojetepasix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5022/8119/files/askep_pada_anak_dengan_bronkopneumonia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/93806794305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2639/0933/files/star_wars_saga_edition_character_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8896/9882/files/13916298108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/29555430687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8638/0189/files/rutenuvixinoloto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5657/8216/files/java_netbeans_tutorial_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/detosibemovevixopenuvalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/77485064545.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA1 5180 bytes
SHA-256: a24d8a77d62c04c4ac7ecccb89c2e7833065cb581c29ec6d018390019177b622
font_01_sfnt_off0000804a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804A 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000088d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D7 15164 bytes
SHA-256: a476b1675ead176eb8cc6edee1c4bf373355d07a03f70b85af5bbf9d9adc9c4b