Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad37114e5ca3970…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 04:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8657d441aaf33cce63412d6cb59c8991 SHA-1: 5e3f7443114c0a63a345d7891c725e7501c16248 SHA-256: 3ad37114e5ca39703d528a2af4a0e0dbcbd8a0c154e62526f498597b59822c3f
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious domain, ttraff.com. The document body, though heavily obfuscated, contains text related to business accounting and the malicious URL. The presence of a link farm heuristic indicates a large number of outbound links, likely for SEO poisoning or to distribute malicious content. The primary attack vector appears to be social engineering through a seemingly relevant document, leading the user 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.com/wix?keyword=marginal+costing+and+absorption+costing+difference
    • https://static.usrfiles.com/ugd/b8c837_85196644eabb4488bdd8950c3fdd374f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0fa239f3bdb440fdab8ffae0ecfc174e.pdf
    • https://static.usrfiles.com/ugd/b8c837_072b4975e4c64ac4a3ebded16938a1e0.pdf
    • https://static.usrfiles.com/ugd/191a6d_a5d4e53f5c9449b8988dbd2ccfa2c651.pdf
    • https://static.usrfiles.com/ugd/353d00_c5eb67b51afd400f9751137af11aa152.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3363/files/puzzle_and_dragons_z_orb_code.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/banale_teri_baby_doll_remix_song.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/manukozusugogipiwoximinuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/sejubamita.pdf
    • https://static.usrfiles.com/ugd/db93e9_44af3e4306714d508e48d8cd2d98f94d.pdf
    • https://static.usrfiles.com/ugd/6f58fb_a1675b9cd1bc495d8437029b80ea374b.pdf
    • https://static.usrfiles.com/ugd/b444d4_46db02d39d964590a01604643d3868ba.pdf
    • https://static.usrfiles.com/ugd/32acb1_7c81dbe352fd41178fcb00465405c9fc.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://static.usrfiles.com/ugd/b8c837_0fa239f3bdb440fdab8ffae0ecfc1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000662f.bin
daa821f62cad19c41b9fac34f2e4df3ea01a1ba3138e7f46175e9f4ee81ee5a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662F 5468 bytes
font_01_sfnt_off000078d4.bin
0055fdc702d6ba32de6746399a97ce4a64eff01eae98ce23f8460846c643f9a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D4 10004 bytes

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