Malicious PDF — malware analysis report

Static analysis result for SHA-256 72cf88c038cdf581…

MALICIOUS

PDF

70.0 KB Created: 2020-08-01 14:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3fa0d972ea701ce9e01df69635faa9a1 SHA-1: 8465da7ca0596296694e2855216de33a6d641c0b SHA-256: 72cf88c038cdf581eec1a91fc6580055a466d2d94a7bd1edc167435e21810c1a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to redirector infrastructure, specifically pointing to 'ttraff.cc', which is flagged as malicious. The document body, though heavily obfuscated, contains text related to a '1997 chevy cavalier repair manual pdf' and the wkhtmltopdf application, suggesting a lure. The presence of multiple PDF links and a malicious redirector indicates an attempt to drive traffic to a malicious site, likely for phishing or malware delivery.

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=1997+chevy+cavalier+repair+manual+pdf In PDF document text
    • http://files.pitkincountyrivers.com/uploads/1/3/0/8/130873787/nufizotulenasikamo.pdfIn PDF document text
    • http://files.atallamdshop.com/uploads/1/3/0/9/130969497/lubujozi.pdfIn PDF document text
    • http://files.heritageschoolofdiscovery.com/uploads/1/3/2/8/132815388/4a249.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/17524121831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/33276796753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/wgu_readiness_assessment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5393/2966/files/riragonaboputopipoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8755/9833/files/nopajizasidiluxugun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2696/4903/files/homestead_exemption_fulton_county.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0939/1261/files/fijemomipirak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/98953179450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/95408072033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/powalowatiwini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/33523408022.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1BB 6680 bytes
SHA-256: a4883e34acc5c690f1112104246c52d3c4b5c1efa914c4ef4be49590a140ebd1
font_01_sfnt_off0000b875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB875 5572 bytes
SHA-256: 3b6a3709a685d8d90ed484efd07689601ef67cef8285e93dfaf2ccf46fba53a9
font_02_sfnt_off0000cb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB59 13340 bytes
SHA-256: 3e2ab7a23d0864bf9dfae782a8ee30d6075afe64baa58fbff9576904eec23b91
font_03_sfnt_off0000f58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 16060 bytes
SHA-256: b10e7a0583bf6b216a5471aeed10f14210f1dda3adb60ac5169fcb38ba12e60c