Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c44161aab93cc7…

MALICIOUS

PDF

49.9 KB Created: 2020-08-18 21:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1472f1455b43b600bdf2fd696a655f15 SHA-1: 67e84ee00b1fd80d2a1824b48819f4c39973c502 SHA-256: 16c44161aab93cc7aca6a2df98de03f3c1eee706e25c316596de9ef1ce0c26b0
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to financial reports and includes the malicious URL, reinforcing the lure. The presence of many external PDF links also indicates a link farm, a common tactic for SEO manipulation and distributing malicious content.

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.ru/pify?keyword=monthly+financial+report+template+powerpoint+presentation
    • http://lupakag.smorgasblogs.com/uploads/1/3/0/8/130873995/rafevaxabupoluk_tozojidowisedi_gariko_gagupexopo.pdf
    • http://files.geneseedance.org/uploads/1/3/1/1/131163902/fejerumavi-xizogasegiv-sizujadevatora-verafowafewa.pdf
    • http://files.rhemayoga.com/uploads/1/3/2/7/132740275/35cd77d39eb9.pdf
    • http://files.chicagoschoolofgrappling.com/uploads/1/3/1/4/131409170/312064.pdf
    • http://files.sitesofpassage.org/uploads/1/3/1/0/131071240/455213.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/59076888754.pdf
    • https://cdn.shopify.com/s/files/1/0433/5697/9351/files/95906392959.pdf
    • https://cdn.shopify.com/s/files/1/0431/8091/6893/files/80925271591.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7959/files/adulthood_is_a_myth_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/difevuzelu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1821/files/16200502258.pdf
    • https://cdn.shopify.com/s/files/1/0440/8259/3957/files/78670133234.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9182/files/35539693197.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/50396463122.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/muatan_gaya_dan_medan_listrik.pdf
    • https://cdn.shopify.com/s/files/1/0449/3810/0891/files/brotherhood_of_war_full_movie.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f4f.bin
a6c88ff200f5bdbbb04bb3cf4f255a71b608e8ce2d107ed04a3d26aadd079903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4F 5452 bytes
font_01_sfnt_off000091c7.bin
c3cede400fee3d55b29acd799b5551dec46f1dba4b44328edc1f1f3edc75521c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91C7 12812 bytes

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