Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d67a743e55e55f1…

MALICIOUS

PDF

37.5 KB Created: 2020-07-30 21:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a7e3e3236a00f3d7f464ba72c223d3c SHA-1: 6935029b0242be4458671fd07d4a4c76b2dc9db2 SHA-256: 2d67a743e55e55f1caf94e7e62e6e1f82b4b252abf6757f04733325ebed504d1
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to lure users into downloading files, with one link pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure for a "spring framework a primer pdf free download". The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=introducing+spring+framework+a+primer+pdf+free+download
    • http://files.nod-production.de/uploads/1/3/0/7/130776118/3864674.pdf
    • http://files.thepurplepetalstore.com/uploads/1/3/0/8/130873728/zexixi.pdf
    • http://files.tionalee.com/uploads/1/3/0/7/130738710/lazazefedurixela.pdf
    • http://files.your4legs.com/uploads/1/3/0/9/130968961/dibibugulapa.pdf
    • http://files.palladinohomeinspection.com/uploads/1/3/1/4/131438464/zuwokerunokurugaka.pdf
    • http://files.your4legs.com/uploads/1/3/0/
    • https://cdn.shopify.com/s/files/1/0430/6635/9962/files/banefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/27250452672.pdf
    • https://cdn.shopify.com/s/files/1/0428/0044/7655/files/bonufubalaxodate.pdf
    • https://cdn.shopify.com/s/files/1/0435/1849/2824/files/70654515418.pdf
    • https://cdn.shopify.com/s/files/1/0429/9427/0371/files/13463362921.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/tamakagibabibofal.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/37102617467.pdf
    • https://cdn.shopify.com/s/files/1/0438/2271/0941/files/96175179889.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/laduvigajilamemesuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/33438036009.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ledoviz.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_off00005543.bin
826bb10db8dcfe51b3056e92cc00375bc868fae5865294215b47fa18bd8dbcdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5543 5448 bytes
font_01_sfnt_off000067ca.bin
0b56f81674d54629e4c162e30f02b4f939f92d5eca8ad612e023e93cbcf8529f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67CA 9548 bytes

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