Malicious PDF — malware analysis report

Static analysis result for SHA-256 5503a073ce572330…

MALICIOUS

PDF

79.6 KB Created: 2020-09-02 14:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b05a47e63b2f9f278a6c394fa74ae57 SHA-1: bf257a6159925f893623ec686a78fd75b991923c SHA-256: 5503a073ce5723304d234e26f89464696f089ee15a3e36ba35a0d8bca746d462
128 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.club, which is used in conjunction with a search query. It also exhibits characteristics of a PDF link farm, with numerous links pointing to external PDFs, many hosted on static.usrfiles.com. The presence of a visual download button lure further supports the malicious intent. The primary malicious IOC is the redirector URL, which is likely used to funnel users to a malicious site.

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.club/wix?keyword=brahman+jesi+jaat+nahi+song
    • https://static.usrfiles.com/ugd/93c935_efad025782f0463a96f2ac7d8fc207a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f9184640aef47dab120f713b69e3e04.pdf
    • https://static.usrfiles.com/ugd/b8c837_559195fe310343769ccc0ecd72120be9.pdf
    • https://static.usrfiles.com/ugd/1ee69b_aba2169bc0114002997bc80e6b25fb68.pdf
    • https://static.usrfiles.com/ugd/c0fca2_51cd7160b3f54648a0336eb9779268f9.pdf
    • https://static.usrfiles.com/ugd/b7082a_e642abe4b4504cf7ad877a639d21ed91.pdf
    • https://static.usrfiles.com/ugd/edb4a7_f69f8f6ade8442ac86b5c15e53574ce1.pdf
    • https://static.usrfiles.com/ugd/078c79_43e079c5214b4017a2a1a49e5436b005.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/natejatedin.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/dapobi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/3851628229.pdf
    • https://cdn.shopify.com/s/files/1/0433/9689/0785/files/5004688277.pdf
    • https://static.usrfiles.com/ugd/6c98bc_c411e729791f498abbffc1fdf147e64a.pdf
    • https://static.usrfiles.com/ugd/238140_374aca46d4b74c62ad3f33fcabbb9f75.pdf
    • https://static.usrfiles.com/ugd/b8c837_62e5a1dca7b24b449a98ad30dade3d75.pdf
    • https://static.usrfiles.com/ugd/99965f_922b322bab654561b80a03491b88e960.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_797da56d280a435ea6c301923de01081.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000708e.bin
d7b8333ef97ceae342254618a082e509f0345aa62758851e69502d91f0fa62cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708E 5192 bytes
font_01_sfnt_off00008209.bin
ca6024b8f44e5c5bb7a897d62ebcb76b16655a4235a258bd51aed0a392aa520d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8209 24268 bytes
font_02_sfnt_off0000caac.bin
abe84a949a12def4cb7b5c67290ba18bc95cc3467ddb1521a6aac81d36f02f7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAC 15012 bytes
font_03_sfnt_off0000f942.bin
b9144ec0bea209472d3362c2158c1ef9a717628e04b683efd46d218996758b45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF942 18212 bytes
font_04_sfnt_off00011480.bin
248b2bc599a22574e3a9426b769068b6d069b717aa1d74812642ca396bc2b74d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11480 7672 bytes

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