Malicious PDF — malware analysis report

Static analysis result for SHA-256 e35c3d2a5ca64eaf…

MALICIOUS

PDF

44.5 KB Created: 2020-09-01 06:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aad13c00363ab55febaaf9bb1ad3f9af SHA-1: 1433e21ed899633c57e368b7d90cc9c6f97f2d87 SHA-256: e35c3d2a5ca64eaf73cf929d86c998b71048c1a740bd1462562bd5db10607a87
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=adm++manager+apk+for+pc'. This URL is presented within the document body, likely disguised as a download button or call-to-action, aiming to trick the user into clicking it. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning tactic to distribute 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.cc/wix?keyword=adm++manager+apk+for+pc
    • https://static.usrfiles.com/ugd/963627_c11351df9aa44bc89308d6acc33cc887.pdf
    • https://static.usrfiles.com/ugd/b8c837_834b4f043556456aaa3fd29d90dcb026.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4506ad533c04849b2b77043daac6fa3.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a0a10997d3745ed997e57cab4ea23bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_affe1b30498c467f87c4f69187cf9570.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/swimming_pool_rules_and_regulations.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/tika_camaj_nude.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/movie_wav_files.pdf
    • https://cdn.shopify.com/s/files/1/0457/9183/8364/files/keiko_matsui_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/2957/6352/files/connect_four_c.pdf
    • https://static.usrfiles.com/ugd/81d6a4_b988c459a2fb4821bfaa31107223efc0.pdf
    • https://static.usrfiles.com/ugd/ce5d00_b22ffadd5d19479a90607d646654ba1a.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5099/files/24539333639.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/28872910585.pdf
    • https://cdn.shopify.com/s/files/1/0440/8606/7352/files/cancionero_cristiano_2018.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_off000062ae.bin
0b19e68fa05f65f7704fd7cabb80a2b5648e2195c6ee339a478ad813c5771e70
pdf-font-stream PDF embedded font (sfnt) at offset 0x62AE 4976 bytes
font_01_sfnt_off00007375.bin
d69b743d002891fe36ad594aaf7c1a19851e91b098020e749c48d69d39906011
pdf-font-stream PDF embedded font (sfnt) at offset 0x7375 10420 bytes
font_02_sfnt_off00009703.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9703 4324 bytes