Malicious PDF — malware analysis report

Static analysis result for SHA-256 58856aaf345657ab…

MALICIOUS

PDF

109.9 KB Created: 2020-08-09 20:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4ad4152ec1a32053106c7a36c072079 SHA-1: 5eaa5a174332b79e45dba8e6bfd0e7abcfc6af75 SHA-256: 58856aaf345657abc16416e86b24167fc8452b50e26568198aa8a609c23736d0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=dictionnaire+des+abr%25C3%25A9viations+m%25C3%25A9dicales+pdf'. This URL is presented within the document body, disguised as a link to a medical abbreviations dictionary. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=dictionnaire+des+abr%25C3%25A9viations+m%25C3%25A9dicales+pdf
    • http://files.mylifeisajourney.com/uploads/1/3/1/8/131857890/3522920.pdf
    • http://fugisoxep.oscarxavierdelsebastien.com/uploads/1/3/1/4/131407089/paperidoxomemodogem.pdf
    • http://xeliwa.atomiccarcare.com/uploads/1/3/1/4/131407493/noseri_livitoruxavo_kadenimosawa.pdf
    • http://files.cahabariverdesigns.com/uploads/1/3/0/7/130739463/6217805.pdf
    • http://files.roundrocklions.org/uploads/1/3/1/3/131380773/mawagipejegasafuwad.pdf
    • https://cdn.shopify.com/s/files/1/0439/1796/7528/files/kumuro.pdf
    • https://cdn.shopify.com/s/files/1/0432/9229/5332/files/60979967502.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/wewuwulodurer.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/pujidifovanebo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4731/2789/files/aptitude_shortcut_tricks_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/9965/9176/files/20_hp_briggs_and_stratton_engine_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0440/6080/3237/files/genetic_engineering_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/42069246192.pdf
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/rizegonemofasabolulomada.pdf
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/jaguar_x_type_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3563/files/23194938580.pdf
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/b._ed_books_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/becker_final_review.pdf
    • https://cdn.shopify.com/s/files/1/0428/6870/3398/files/discussion_paper.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014847.bin
7932c16ed3a58c3e2d6ceb1ecad100b5380accd14aa9d62b5c2038229e99bd2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14847 5644 bytes
font_01_sfnt_off00015b25.bin
502f1dfd3cb27eed10be00558bcc520a7189f252a2db24e726a42c4a3d8312a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B25 19048 bytes
font_02_sfnt_off00019209.bin
f80b9f84d6ea16074f67da7a904ab41e14e5a44612b81a97f195d72f9bd2a496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19209 16160 bytes

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