Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42f00e5873e50f7…

MALICIOUS

PDF

42.4 KB Created: 2020-08-28 08:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 061242f929f4575da07ed535a911e5f2 SHA-1: f7bc03a55c9ae9ef9f8990b1dd2f30d64d479b8f SHA-256: f42f00e5873e50f763faf2fbda8e1c08f4f6e1f729308421cc1eaa571a15d6ab
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a book title, which is a common lure for phishing or malware delivery. The ML classifier strongly indicated maliciousness. The document body contains the primary malicious URL and several other URLs pointing to PDF files, likely part of a link farm to improve search engine ranking for malicious content.

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.club/pify?keyword=ensayo+del+libro+para+combatir+esta+era
    • http://files.medspabeautyescape.com/uploads/1/3/1/8/131856883/bugabugafuk.pdf
    • http://lowiful.tamramccarthy.org/uploads/1/3/0/8/130814328/xilukedupopiwul.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/petog.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/julilafulogezupogomovusat.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7629/files/retroarch_keyboard_controls.pdf
    • https://cdn.shopify.com/s/files/1/0430/5335/1066/files/rozotawajotati.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/90646028641.pdf
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/91365071195.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9812/files/99389849473.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/marcus_aurelius_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0431/9435/1778/files/fazoveda.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6158/files/dedosapupelole.pdf
    • https://cdn.shopify.com/s/files/1/0428/9780/1375/files/domestic_animals_flashcards.pdf
    • https://cdn.shopify.com/s/files/1/0431/8520/9506/files/1987722061.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000652a.bin
9875874b44579fde4df48ad41afbf8b2876d6bcea85a5e14227dab78e81a8a5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652A 5420 bytes
font_01_sfnt_off0000777a.bin
9f7eeee4bfdabf05375c30f306f6cc0f198ddf001f3cf28578adfcd8b9dcb37d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777A 10800 bytes

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