Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc7828a8359ce28f…

MALICIOUS

PDF

42.3 KB Created: 2020-09-07 02:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dbd5a13109abe30945da33f6d7308fa SHA-1: d576c9159dcfcb57a49131eed0354c529d59aa54 SHA-256: bc7828a8359ce28fcac798de8f8c144a5309c92cb9b6e40d5731d70fe805ad25
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector link disguised as a download for a 'Marvel comics app mod apk'. This lure is reinforced by a visual download button heuristic. The document body, though heavily obfuscated, contains the malicious URL and references to the lure. The primary malicious URL is `https://ttraff.link/wix?keyword=marvel+comics+app+mod+apk`.

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.link/wix?keyword=marvel+comics+app+mod+apk
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/25208160419.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9975/files/27052317657.pdf
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/kigosat.pdf
    • https://cdn.shopify.com/s/files/1/0433/8080/1703/files/technique_de_traduction_francais_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/abhinetri_2_telugu_movie_720p.pdf
    • https://static.usrfiles.com/ugd/c1108c_5f7944e6b90c4e4f943daa5d62436721.pdf
    • https://static.usrfiles.com/ugd/16a96a_70f131a89c154bcdb097a6ecadebaa0f.pdf
    • https://static.usrfiles.com/ugd/b914b5_d8bba0e9e1264685a0feb6d2598f9b00.pdf
    • https://static.usrfiles.com/ugd/3ed902_486c6f3ca67644d2a462720abbaee63d.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/kuzixozegeduzadavemazew.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/cephalometric_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0437/3918/5303/files/watapilovoxujix.pdf
    • https://cdn.shopify.com/s/files/1/0429/6930/1151/files/81236663427.pdf
    • https://cdn.shopify.com/s/files/1/0433/3997/2773/files/72858614419.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_off000066dd.bin
bb2f7532c87546d61d7c5e603b90264cd089e953787e319ff52f550979373f05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66DD 5348 bytes
font_01_sfnt_off0000790a.bin
4dfb7a4cbb6b78a36d0340ef14868bcf196911f6f672186a0e2a4647f3e364eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790A 10360 bytes

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