Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcbf55c88c6b971c…

MALICIOUS

PDF

42.2 KB Created: 2020-08-18 15:39:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43bf173504786013d5f55e48de225dc1 SHA-1: bb08d8ca85e6847129d3bbcd31260cfa3618cf28 SHA-256: dcbf55c88c6b971c7930371fa3f4eba9526cefe80b7f1e04e64223385cdbc752
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised as a 'business card maker program free' download. This is further supported by heuristics indicating a malicious redirector and a link farm designed for SEO manipulation. The presence of a visual call-to-action button reinforces the deceptive nature of the document.

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=business+card+maker+program+free
    • http://files.ukyorthoresidency.com/uploads/1/3/1/3/131383247/wamixuxovad.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/vefufit.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/jorge_luis_borges_library_of_babel.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/xozav.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/zomukusezojofagedubamapi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/wixabebakanapekujulowet.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1966/files/16898644195.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/xivepox.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1651/files/nibenodajofirulotobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2373/6725/files/arcgis_javascript_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/training_prayer_osrs.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_off00006540.bin
04486541e29c30c2e9bd4d058a2702b6021746ca630d52eaa3b6f540cc41a385		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6540 5556 bytes
font_01_sfnt_off00007811.bin
338b542c39e6c7e2de4ea3c79e77237038461ae1c5798e3812050e23590a0d43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7811 10648 bytes

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