Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcbc1d86d5d8d6a…

MALICIOUS

PDF

40.3 KB Created: 2020-09-04 16:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41745886281235b9a769a89a8a128b4d SHA-1: 3dc90ba24ad9dab13b4d1312dc6b61dd72b51193 SHA-256: 8dcbc1d86d5d8d6a0c733bda60c41e0bc4c2badcead21a3de45480011be25aff
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 promises a modded APK. The document body also contains this URL, reinforcing the lure. The file also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, likely for SEO poisoning or to distribute further malicious content. The primary malicious URL is https://ttraff.club/wix?keyword=alien+shooter+mod+apk+latest+version.

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.club/wix?keyword=alien+shooter+mod+apk+latest+version
    • https://cdn.shopify.com/s/files/1/0433/6028/8927/files/luxalaxukukukiwozo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/55166880558.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/saligukodupakuvab.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/effects_of_water_pollution_on_fish.pdf
    • https://static.usrfiles.com/ugd/dc51bb_fd88424229c84f179052f5fc4f7dea5e.pdf
    • https://static.usrfiles.com/ugd/ce5d00_70ad4b5a30454747bd1c7a5b48a620c3.pdf
    • https://static.usrfiles.com/ugd/accd1f_d80731837a1f475fb3085094b54e67ff.pdf
    • https://static.usrfiles.com/ugd/f4de5e_3768659ec5c747fe8c9e97d6d34afc57.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/83644014119.pdf
    • https://cdn.shopify.com/s/files/1/0440/9724/1240/files/96135200767.pdf
    • https://cdn.shopify.com/s/files/1/0435/0446/8134/files/33785327714.pdf
    • https://cdn.shopify.com/s/files/1/0440/5411/8550/files/autograph_full_movie_in_1080p.pdf
    • https://static.usrfiles.com/ugd/b8c837_03d499f51e7b4a1eb8ad2d3b9e66bfb0.pdf
    • https://static.usrfiles.com/ugd/a76634_688a3bdd1bfc4bc19a1d7ae1b07e6c4c.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_off00005f38.bin
99e38fc97c8538620e8e306796ae3aa95d5f9078a70f5d141e00a4c78e7aaf74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F38 5312 bytes
font_01_sfnt_off0000711e.bin
d2db3d7ac77d1b8c50e70579c59de712ba4548744bf81609b2e36c0a6f9218fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x711E 10260 bytes

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