Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63bec8c6a05239d…

MALICIOUS

PDF

31.1 KB Created: 2020-08-19 11:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9cd1bfaadd0191e15935ea7c83d1199 SHA-1: 5dccc7f8c5dde60d560cf00ddbaa44e1cbb8a1f6 SHA-256: e63bec8c6a05239d8e83c20947250aede2fa95f3ddd1dc030230d23f9402c98f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body text, though heavily obfuscated, contains the string "Wifi booster easy connect apk", suggesting a lure for users to download potentially malicious software. The presence of a malicious redirector indicates an attempt to lead the user to a compromised or malicious site.

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=wifi+booster+easy+connect+apk
    • http://files.danielcharlesconroy.com/uploads/1/3/2/6/132682930/cfda7058c8d0.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/human_anatomy_martini.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5916/files/divajok.pdf
    • https://cdn.shopify.com/s/files/1/0435/6443/3566/files/tulosuturawusuxowe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/nepupokakokup.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/endospore_formation_in_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/exportacion_de_arandanos_peru.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/96196441840.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/50890528000.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/macroeconomics_charles_jones_3rd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7741/files/rajifet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4756/7010/files/corpse_bride_victor_s_piano_solo_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7581/files/candy_convertidor_jpg_a.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_off0000412f.bin
85d8b930927853c0fd52c40a552cc9696953fac8160fb00c5b4ac9bfa9937b41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x412F 5296 bytes
font_01_sfnt_off00005351.bin
036b7a5fb9cad1ac24de89bcc42026215b1247234264a634519aa758d421f735		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5351 8312 bytes

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