Malicious PDF — malware analysis report

Static analysis result for SHA-256 8639db4be1e5dfcb…

MALICIOUS

PDF

114.1 KB Created: 2020-07-29 10:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b70ed617d0cc8fdf7057c5765b969d19 SHA-1: 214dc23242617ca690fcff5f22a57eff493f89bc SHA-256: 8639db4be1e5dfcb69d23bbc0c45ac227fe9d3ee5b61813a3341e4d37b437798
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'botanical names of plants pdf', likely a pretext for phishing or malware distribution. The ML classifier strongly indicates maliciousness, and the presence of many external links points to a link-farming or redirection scheme.

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=botanical+names+of+plants+pdf In PDF document text
    • http://files.rochestercursillo.com/uploads/1/3/1/4/131406412/vezesigu-sesugazurujod-tawavimufapuvu.pdfIn PDF document text
    • http://files.tresasbridal.com/uploads/1/3/2/8/132814624/bixawojori-nebekoxa-gesalor-tapatalusupojad.pdfIn PDF document text
    • http://files.brushcreekcreamery.com/uploads/1/3/0/7/130776567/karimiduz.pdfIn PDF document text
    • http://files.150spear.com/uploads/1/3/0/8/130874683/giwasugezoka.pdfIn PDF document text
    • http://files.franciscanfoundation.org/uploads/1/3/1/4/131438509/841a2d01ef1c.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/1/0433/0687/7080/files/14985018959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3273/0008/files/lexubitumezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0449/1937/files/56442030201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/93448018890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4003/8302/files/63467250103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3846/files/58988732815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/ranefitokonogisiwudaril.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/64157293831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/mokusomirifirunufonom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6763/7917/files/lojutebizedebiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1543/0559/files/16364258693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/59428762857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/detomoliveso.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: acorridor.com.au 3 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000163c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163C6 5044 bytes
SHA-256: a43effbadf514697bfa631f7d2b29b17504b751013625ed2362cdbe0de2ff6d5
font_01_sfnt_off000174cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174CF 15672 bytes
SHA-256: 1c96a901cd54815726306db978782b933c253631ec3b4b85cddd19663136b501
font_02_sfnt_off0001a598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A598 16136 bytes
SHA-256: c398bfab4e5c9cac1b23aed26100ed1969cf8220adf7adeeb12de3002a392988