Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ee5db9952a6429…

MALICIOUS

PDF

47.2 KB Created: 2020-08-12 00:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acb1d3c65a1a438c5979fd2ca4775a35 SHA-1: f6ace7308b0e274c05ef6e8dfaf22a53c9edfe3a SHA-256: 63ee5db9952a64295853e4a1fd77654afe06d60644e5b0b0e38a73e07c199ee2
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a technical support interview guide. The document body and embedded URLs suggest a lure to a phishing or scam page. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs indicate potential for malicious JavaScript execution or redirection.

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=technical+support+engineer+interview+questions+and+answers+for+freshers+pdf
    • http://files.slowfoodcaterers.com/uploads/1/3/1/4/131438013/1768033.pdf
    • http://files.rampcheckglobal.com/uploads/1/3/0/8/130874233/5165768.pdf
    • http://files.lifewisegifts.com/uploads/1/3/0/8/130874128/6ab8d3.pdf
    • http://sadiroz.yorkrepublicanwomen.org/uploads/1/3/1/4/131453046/2234279.pdf
    • http://files.pacsyr.com/uploads/1/3/1/4/131407112/5141467.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6851/2669/files/systematic_theology_an_introduction_to_biblical_doctrine.pdf
    • https://cdn.shopify.com/s/files/1/0438/5118/6336/files/7994882653.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/aerodynamics_anderson.pdf
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/todupozanaputijubiba.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/medical_fitness_certificate_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/41727362126.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/pakusuweg.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/wajimegin.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4096/files/67115960135.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_off00007932.bin
b2d74e114cac132c7470969ef245b67e1ec2ea2ffb4bc9b77f203d62b295b06c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7932 5644 bytes
font_01_sfnt_off00008c5d.bin
ea6778117058832590189bae5bac948bcaf2dd4ddf6153c5c18588d8e3bf556d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5D 10188 bytes