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)
MD5: 3fa0d972ea701ce9e01df69635faa9a1 SHA-1: 8465da7ca0596296694e2855216de33a6d641c0b SHA-256: 72cf88c038cdf581eec1a91fc6580055a466d2d94a7bd1edc167435e21810c1a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a repair manual. This indicates a likely phishing or malware distribution attempt. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm designed to improve search engine ranking for malicious content. No scripts were extracted, but the primary threat is the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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
    • http://files.pitkincountyrivers.com/uploads/1/3/0/8/130873787/nufizotulenasikamo.pdf
    • http://files.atallamdshop.com/uploads/1/3/0/9/130969497/lubujozi.pdf
    • http://files.heritageschoolofdiscovery.com/uploads/1/3/2/8/132815388/4a249.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17524121831.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/33276796753.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/wgu_readiness_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0429/5393/2966/files/riragonaboputopipoze.pdf
    • https://cdn.shopify.com/s/files/1/0434/8755/9833/files/nopajizasidiluxugun.pdf
    • https://cdn.shopify.com/s/files/1/0429/2696/4903/files/homestead_exemption_fulton_county.pdf
    • https://cdn.shopify.com/s/files/1/0436/0939/1261/files/fijemomipirak.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/98953179450.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/95408072033.pdf
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/powalowatiwini.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/33523408022.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

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

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