Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d63d5f52e27f36…

MALICIOUS

PDF

46.8 KB Created: 2020-08-20 10:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b0f23efaab2ee49fac04aa0e3800f64 SHA-1: 03056c9ae407e5ed62bf3d1f23aed5e53433e02b SHA-256: c8d63d5f52e27f36844babbd001c78ea028613ab4c8976eb9caaae03abca11ae
150 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=bike+race+mod+apk+unlimited+coins'. This URL is presented within the document body, disguised as a lure for a modded application. The document also contains a PDF link farm heuristic, indicating a large number of external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary intent appears to be redirecting the user to a 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=bike+race+mod+apk+unlimited+coins
    • http://files.mmdrentals.com/uploads/1/3/1/4/131406344/e65f93.pdf
    • http://files.loveletters.website/uploads/1/3/0/7/130775679/5631370.pdf
    • http://pubowo.lovinglifeguidance.com/uploads/1/3/2/6/132696194/0264a69f.pdf
    • https://cdn.shopify.com/s/files/1/0432/3547/5624/files/46094629863.pdf
    • https://cdn.shopify.com/s/files/1/0433/9299/1399/files/30236595009.pdf
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/mamuwejumemadoki.pdf
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/rezikes.pdf
    • https://cdn.shopify.com/s/files/1/0435/6043/5871/files/kalawinegomamumirabukeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/96058493819.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/wavuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/jspdf_autotable_min_column_width.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/el_canto_triunfal_lldm.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/kingsway_music_library_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/7792/5019/files/fevelopezuwur.pdf
    • https://cdn.shopify.com/s/files/1/0435/6174/6595/files/68272375966.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/zavimibumenimodesow.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_off00006e71.bin
619a44e8b5c2a2d3fc0e18259d8022938ad4f8b30552901bc68dc41c3d0f2ef0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E71 2880 bytes
font_01_sfnt_off000078af.bin
dd330b02733dcb427015efba4878cfecc50b3896d92b97eda96d568ef91fe660
pdf-font-stream PDF embedded font (sfnt) at offset 0x78AF 5332 bytes
font_02_sfnt_off00008ab0.bin
fb69d1fcefcb4cf2aa30257c8406b832703ea46e2f38499976d80c437e7a2199
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB0 10128 bytes