Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f3122348f88f8d…

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 04:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 751a3cddf82c9c217e7cfcdd54b73540 SHA-1: f43ebd9535150c91fa56fed89cfd3c9c97ecb064 SHA-256: a5f3122348f88f8d52a0fc317ca3a7a84aa1e6dcb98743368dd38df9ce8677e6
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to a URL that appears to be a lure for movie downloads. The document body also contains this URL, reinforcing the social engineering aspect. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, though most appear benign. The primary malicious indicator is the redirector link, which is likely used to funnel users to a malicious site.

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/wix?keyword=mr+and+mrs+smith+2005+full+movie+download
    • https://static.usrfiles.com/ugd/b8c837_657f591d17b945b486d7ac5fd71ae535.pdf
    • https://static.usrfiles.com/ugd/c0fca2_ae7068fbfbc7495ca7918ba4b7a6675a.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_1c69d32d8d5749bd962fcf84ef553111.pdf
    • https://static.usrfiles.com/ugd/b8c837_6671b1757c4f4f7fbbbbcd7c8b6db5f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0d719c7cbb34ac58bc1becf29c5f5e5.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2564/files/carpet_making_video.pdf
    • https://cdn.shopify.com/s/files/1/0430/6278/8245/files/26139375977.pdf
    • https://cdn.shopify.com/s/files/1/0447/9251/2678/files/zitofituzi.pdf
    • https://cdn.shopify.com/s/files/1/0454/3338/9214/files/salebixatubarezifanev.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/cutting_hair_style_image.pdf
    • https://cdn.shopify.com/s/files/1/0435/5260/4328/files/foraniferemisijigumoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/0682/7428/files/figufonitojedejakesesa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3696/files/zawogapojiniwizudasez.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8539/files/459622952.pdf
    • https://cdn.shopify.com/s/files/1/0436/4363/3822/files/48338547803.pdf
    • https://cdn.shopify.com/s/files/1/0430/8988/7396/files/kesorenajezi.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
stream_005_off00008490.bin
cda70a2d1b5d10731a3f2cf66a6eb3a7b791b2c3a2a8106f93b6add9d8379dc2
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8490 21660 bytes
font_00_sfnt_off00004d3e.bin
01d5a00e488fe5664900e899d1257e9672d53e461405e82bdcf7662fc568431f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D3E 5700 bytes
font_01_sfnt_off00006095.bin
16eccd7710ec885ea12e397fbdfe5d38189d6a12d22b7e1b6b41648264d1fedc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6095 10436 bytes