Malicious PDF — malware analysis report

Static analysis result for SHA-256 8862eab99a8952df…

MALICIOUS

PDF

44.4 KB Created: 2020-08-11 02:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 848247b47c7792e7901b17c379852013 SHA-1: 2dcac23177b6813d40c6979190c7dd76afcca1cf SHA-256: 8862eab99a8952df2bfeab81b97e7558c0891387a25c126729d7e8b30e3588ad
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links redirects to 'https://ttraff.com/pify?keyword=modal+auxiliary+verb+list+english+pdf', which is identified as malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to lure users to malicious sites.

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.com/pify?keyword=modal+auxiliary+verb+list+english+pdf
    • http://files.keithhowardknox.org/uploads/1/3/2/6/132681443/mizamazukebapeluge.pdf
    • http://files.psychsisters.com/uploads/1/3/1/8/131858044/wilut.pdf
    • http://files.svdreamer.com/uploads/1/3/1/0/131070718/jupefazubuletofega.pdf
    • http://sufekate.trunorthinspections.com/uploads/1/3/1/4/131437812/19931d2306678.pdf
    • http://kumesaji.wordsthatcomfort.com/uploads/1/3/1/4/131452903/3947076.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/english_grammar_adverbs_of_frequency.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/present_ministers_of_karnataka.pdf
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/suvidodixusoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/6667/0745/files/arithmetic_series_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0430/7710/7865/files/pesquisa_bibliografica_em.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/gutelap.pdf
    • https://cdn.shopify.com/s/files/1/0449/0749/5591/files/75754241567.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2957/files/mopuvokuguramakokofap.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/47978882282.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/sepenezileje.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2503/files/download_aadhar_card_format.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6983/files/diwazakowu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/zavutuliramegebumeno.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_off00007072.bin
db6b60132f96be45254f6f69f23f6fa44ca098388370027a843770c1c8393360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7072 5676 bytes
font_01_sfnt_off000083d1.bin
5126b7dbab20114add2f014df07308508353b5bd9bd23c5052c0ea361066bb4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D1 9428 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.