Malicious PDF — malware analysis report

Static analysis result for SHA-256 b33b8c13f122c1e9…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 17:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07f176ca77b32dc67eae421908c97857 SHA-1: 25ea0b4d7eeba03dd79e2b0859d9093a0cabd71d SHA-256: b33b8c13f122c1e959662e981635349647a6b288a48bb5e9278f029c0d9603cb
128 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, specifically pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains text related to '10th marksheet online correction' and includes the same malicious URL. This suggests the document is designed to trick users into clicking the link under the guise of academic document correction, leading them to malicious infrastructure. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious content.

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.me/pify?keyword=10th+marksheet+online+correction
    • https://static.usrfiles.com/ugd/aef5b7_3d933df746e64a5b88e18534c2dabec2.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdac5216c419411fbf86e9ccc374eabb.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ee1cf382a9e47acaf634a3dbb58835d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0775ccb3b10543b584732e3dc8571d0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d762bab8e367463a80d8b9eff268446d.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_dc07e9d82bde4c319682434d9f01e566.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4920/files/pifazagesodada.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/navodaya_admission_form_class_6.pdf
    • https://cdn.shopify.com/s/files/1/0463/0278/9789/files/migafazese.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/23070590873.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/disciplinary_improvement_notice_template.pdf
    • https://static.usrfiles.com/ugd/b8c837_11aa4c9333a142c0af0c7741f0e27970.pdf
    • https://static.usrfiles.com/ugd/e78b77_6eb8679524744a60b0b1d73cdf494954.pdf
    • https://static.usrfiles.com/ugd/5a1791_4cc47551e8804e8d9b1cf1f618891714.pdf
    • https://static.usrfiles.com/ugd/361045_50719db0f768475aaeaeb42f2b2737af.pdf
    • https://static.usrfiles.com/ugd/469aea_fac998d7482b44a990c2b9fe8932615f.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
font_00_sfnt_off000059a7.bin
bde2eb048d55fd95ff456c0400925b315cbf79e3da1a20a531c17a759b8f5488
pdf-font-stream PDF embedded font (sfnt) at offset 0x59A7 4988 bytes
font_01_sfnt_off00006a64.bin
8ee9b2ddf043a31a554689df24960b44b66df1f4288bdff2569ee442e35e3c05
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A64 10188 bytes
font_02_sfnt_off00008d4e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4E 4324 bytes