Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f43ba27425b122…

MALICIOUS

PDF

52.4 KB Created: 2020-07-30 11:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa0ee14ccf65a658d53f720e347250eb SHA-1: e0cee3344b0203a30fb71f557c4ee5c1f7a609d6 SHA-256: b9f43ba27425b1229617727af81cd775af551f6fab3d836b016287ace9f3331d
128 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=chuy%25E1%25BB%2583n+file+pdf+sang+d%25E1%25BA%25A1ng+%25E1%25BA%25A3nh'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on various domains. The presence of a 'download button' heuristic further suggests a lure to trick the user into clicking these links. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=chuy%25E1%25BB%2583n+file+pdf+sang+d%25E1%25BA%25A1ng+%25E1%25BA%25A3nh
    • http://files.clearforkpublishing.com/uploads/1/3/1/8/131871659/sovaxitavoreduz.pdf
    • http://files.thecuriouscatgiftshop.com/uploads/1/3/2/6/132681596/puwakir.pdf
    • http://files.oursavinggrace.co.uk/uploads/1/3/1/8/131856498/8cadd82d2a0a5.pdf
    • http://files.rlbartstudio.com/uploads/1/3/1/1/131163590/9097118.pdf
    • http://files.musicdepotrocks.com/uploads/1/3/2/6/132696044/6639480.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/20754363270.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/81191300625.pdf
    • https://cdn.shopify.com/s/files/1/0437/3728/4762/files/koverigilu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9541/6213/files/88347350243.pdf
    • https://cdn.shopify.com/s/files/1/0438/4958/0704/files/wowaderovujaxudukegi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/50194716063.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/meveg.pdf
    • https://cdn.shopify.com/s/files/1/0435/5322/6913/files/29297645161.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5990/files/61948895605.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/zagilulusoxuwelogemagis.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/majomiwokefitibod.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_off000089a6.bin
4cf117923a2246777c3e24ede8deeca8cff561f34e25e46e226445f3c731abc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x89A6 5724 bytes
font_01_sfnt_off00009ba6.bin
794b29c5065da8c03217d54380c08f3a1a645e0fc4209f60f62b2a27c400cffa
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA6 12716 bytes