Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e45ee876fbb7f6…

MALICIOUS

PDF

46.7 KB Created: 2020-07-30 03:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e227aaf2f81913560a0db8e06260f59c SHA-1: a3610e6d1bde48de1c044dabc63529ce9d49758f SHA-256: f8e45ee876fbb7f6d03306aba41b2a0352cca9fd8fa94588bcdde3e4f3554435
130 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, which is further supported by the presence of a large number of external PDF links, suggesting a link farm. The document body, though heavily obfuscated, contains text that appears to be a notification, and a heuristic indicates a visual download button lure. The primary malicious IOC is the redirector URL.

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=rrb+cen+01+2020+detailed+notification+pdf
    • http://files.skinsalvy.com/uploads/1/3/1/6/131637723/dogowab-jekabapawazowi-fomixa.pdf
    • http://files.corderovasquezlab.com/uploads/1/3/1/0/131071253/jewawebasenov.pdf
    • http://files.kahorpedahl.com/uploads/1/3/1/3/131383541/141476b.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/25729782258.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0433/6104/2591/files/fazusekotavujufirovejejo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/doronidoxesebeza.pdf
    • https://cdn.shopify.com/s/files/1/0428/2354/9094/files/desimozap.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/24307349187.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5622/files/26431203379.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/nuwibimozikazek.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/64549616545.pdf
    • https://cdn.shopify.com/s/files/1/0435/8973/0472/files/jodute.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/61840292138.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/
    • https://cdn.shopify.com/s/files/1/042

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007039.bin
b7584199cba4bd019d65d85583cdfae72d616b216ebd06b20ab3254ce41e4499		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7039 5232 bytes
font_01_sfnt_off00008208.bin
177422787f745e359fd3ce45dd2b5a5bd7185686b910ef48228577e325c4131e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8208 13752 bytes

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