Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d05c145f3e2d546…

MALICIOUS

PDF

49.2 KB Created: 2020-08-02 12:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4dffc01fe88999b51795a6e58fbe8c9 SHA-1: bf70729ca414bb8cb98dfdf745033a9c4b5748d2 SHA-256: 4d05c145f3e2d54685140dd4cf20caf10323a28c6092abe123b07df0204a1016
160 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to benign content on Shopify. However, one critical link redirects to `https://ttraff.cc/pify?keyword=curl+set+header`, which is known malicious infrastructure. The presence of a visible LOLBin command execution instruction further suggests malicious intent, likely to facilitate the download or execution of a secondary payload. The document body itself is heavily obfuscated but contains references to the malicious URL and other PDF links.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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=curl+set+header
    • http://files.watersportsinkorea.com/uploads/1/3/0/7/130776167/db9509707c7.pdf
    • http://files.knowbiblefactsfromfiction.com/uploads/1/3/1/4/131438567/3033865.pdf
    • http://files.quapawcattlecompanystore.com/uploads/1/3/0/7/130776485/2110856.pdf
    • http://files.prairieprecisionsteel.ca/uploads/1/3/1/6/131606874/86177f6.pdf
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/pafifekoxaboboniba.pdf
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/6701008400.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/heartbeats_jose_gonzalez_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/48763130659.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/social_psychology_gilovich.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/91234984840.pdf
    • https://cdn.shopify.com/s/files/1/0434/9929/0776/files/jugud.pdf
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/20353116438.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/29793781464.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_off0000772c.bin
cb222c77e2e6e68cc0379e7fbb058af28bb322f3e7303d301440f75086488cff
pdf-font-stream PDF embedded font (sfnt) at offset 0x772C 4816 bytes
font_01_sfnt_off00008776.bin
f53023246dbf6e9461e13fff00ab53445cc4c49dd3bd42ffa7dbacb612fd5f93
pdf-font-stream PDF embedded font (sfnt) at offset 0x8776 15536 bytes