Malicious PDF — malware analysis report

Static analysis result for SHA-256 b305bb052fb7259f…

MALICIOUS

PDF

44.2 KB Created: 2020-08-24 03:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d824d005ec853f43981a9b4175589248 SHA-1: bf1c53ff53de521de7fdb1544cda3ad68f5a12cc SHA-256: b305bb052fb7259f4b4ca9d788ea61df307ea5b7d17eeed540f3e5a12a861b7d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=video+facebook+online+url`. This, combined with the 'Browser extension / update installation lure' heuristic, indicates a social engineering attempt to trick the user into clicking the malicious link. The document body, though heavily obfuscated, also contains the malicious URL and numerous benign-looking PDF links hosted on Shopify, likely to mask the malicious activity. No scripts were extracted, but the presence of a malicious redirector and the lure suggest the intent is to lead the user to a site that will either steal credentials or download further malware.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=video+facebook+online+url
    • http://vikidixob.playingwithpallets.com/uploads/1/3/1/3/131398186/derepa.pdf
    • http://fevirapu.forestlakescounseling.com/uploads/1/3/2/6/132681233/50018.pdf
    • http://files.premiereemcee.com/uploads/1/3/1/4/131454373/pelivok.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/tanzania_advanced_mathematics_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0437/5245/6346/files/38179207688.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12909571685.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/mivezikutafubawawoxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/duzadipuxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/leonardo_dicaprio_meme_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/1329/8581/files/41132712630.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2230/files/zepepev.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6348/files/85609944120.pdf
    • https://cdn.shopify.com/s/files/1/0451/4293/3657/files/assembler_document_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7185/files/dodge_charger_2012_owners_manual.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_off00005a71.bin
900eaa0f4ed09ebf628f93d3d467949324474a6d8c7766c33f416fb38b3a6dfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A71 5008 bytes
font_01_sfnt_off00006b88.bin
539b5c839d330afe2bc858b14d538e2bedf9064bc7d95a82bb4eae6e87f23da8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B88 10084 bytes
font_02_sfnt_off00008e49.bin
ee8b8f013b6f51ea08ae5b70d5412f202f6a9076b23c75f4a41c6f6118619bdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E49 16340 bytes