Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2735dae9dd2ee5…

MALICIOUS

PDF

44.6 KB Created: 2020-09-01 01:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42d90ac532364ea7b9937d85055feb99 SHA-1: 5de3861b3e3b703cbe925a28832a83fcd3da8950 SHA-256: 8c2735dae9dd2ee534d6a607fc535499e144ad274e338f98afeb62ad25f51659
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.me/wix?keyword=atherosclerosis+mechanism+pdf as malicious. The presence of a link farm (PDF_SEO_LINK_FARM) further suggests a malicious intent to drive traffic to potentially harmful sites. No scripts were extracted from this sample.

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.me/wix?keyword=atherosclerosis+mechanism+pdf
    • https://static.usrfiles.com/ugd/55f640_bbce087d52bf48679e84cf21ff530b95.pdf
    • https://static.usrfiles.com/ugd/739437_04fab1274bef430fbc73aa639c7d6d75.pdf
    • https://static.usrfiles.com/ugd/b8c837_e05996274a114557ba240fe8438ab133.pdf
    • https://static.usrfiles.com/ugd/ea78e0_492c0cf8c7b845b4ba8b8217c098f3da.pdf
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/fekonosiluduxotunux.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/beer_pong_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/3759/7591/files/manajemen_sumber_daya_manusia_simamora.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/hallelujah_piano_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/7188/0870/files/68324203465.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/togevuraw.pdf
    • https://static.usrfiles.com/ugd/77eba6_d985d42b4642409983a0a85dd75d0d15.pdf
    • https://static.usrfiles.com/ugd/b8c837_762b6dbac868490a9eb1d82683b1ecc1.pdf
    • https://static.usrfiles.com/ugd/6f53d7_b6d6cda34d634860b3860ad6706f0730.pdf
    • https://static.usrfiles.com/ugd/87d215_dc5e2057bb37457ea28e0ec85694bdd5.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_fdfbb6ec3e3044daabf9954b10b35861.pdf
    • https://medlineplus.gov/atherosclerosis.html
    • 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_off0000702b.bin
172138bd0f3667b13b2bfecd0aca4fba74cab7a1290a518692a675967892bbd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702B 5384 bytes
font_01_sfnt_off0000824f.bin
c230d98048bb8ebac601b366e595f423ada29bb1f19e3f103acd2db8f851b438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x824F 10324 bytes

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