Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc827711879ff4c…

MALICIOUS

PDF

43.4 KB Created: 2020-07-31 07:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5314e8cf084f602e6330698a7ad2fd68 SHA-1: 2f694875ac62819afc33090df12525cdfc468ce4 SHA-256: abc827711879ff4c88e939a000f9fe8959583e25c186052586811c965a494a9f
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'ttraff.cc'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of outbound PDF links, with the first being 'cdn.shopify.com/s/files/1/0430/2936/4889/files/97867595100.pdf'. A low-severity heuristic for SE_DOWNLOAD_BUTTON suggests a visual download lure. The document body is heavily obfuscated, but the presence of these links and heuristics strongly suggests a phishing or redirection attempt.

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=cara+file+pdf+jadi+satu
    • http://files.500paba.com/uploads/1/3/2/6/132695244/1655897.pdf
    • http://files.veggieinternational.com/uploads/1/3/1/4/131438316/xuveja.pdf
    • http://files.paulstroble.com/uploads/1/3/0/7/130776399/daladakadotolutota.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/97867595100.pdf
    • https://cdn.shopify.com/s/files/1/0434/8729/7696/files/36801328566.pdf
    • https://cdn.shopify.com/s/files/1/0438/5393/8853/files/sazevagatubozixos.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/tupawupabavixafiwabudiruk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/nanatixome.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/biseviwa.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0067/files/jorubuku.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/kefowerugisotaraxeraguki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/silegujusoxas.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/gezasixof.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3388/files/74970818468.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/ruvoduganetigowog.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_off00006e33.bin
546c3b2aeae1a2d6d334a6cc55e6a20560213a6c96d55d2c19376bc90462a29e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E33 4800 bytes
font_01_sfnt_off00007e9c.bin
fcdf8538e9ca7d008de3452bc6350e06e842a346e8bf494128d85b16ad402838
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9C 10152 bytes