Malicious PDF — malware analysis report

Static analysis result for SHA-256 938e5a8104504d1a…

MALICIOUS

PDF

56.2 KB Created: 2020-08-31 21:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 921bec7b3ad7a4cb55b3ffb4f5058666 SHA-1: 79b32245f7ee95253ae1188d08f67d8748ff499c SHA-256: 938e5a8104504d1a40235ff5e9d90507a3ee2db0c6f861ce96e28f930f41a6dc
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=apus+browser+turbo+apkpure'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL, suggesting a social engineering attempt to trick users into clicking the link, likely leading to further malicious content or downloads.

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.com/wix?keyword=apus+browser+turbo+apkpure
    • https://cdn.shopify.com/s/files/1/0437/9167/9648/files/aastha_film_video.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0810/files/vofategorupe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5808/3480/files/81640564035.pdf
    • https://cdn.shopify.com/s/files/1/0433/7529/6677/files/beretta_tomcat_3032_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/pamagumanarimelonut.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0580/files/duveno.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0721/files/80195187980.pdf
    • https://cdn.shopify.com/s/files/1/0435/8779/7160/files/63016823374.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/gewuto.pdf
    • https://cdn.shopify.com/s/files/1/0435/7259/2801/files/statistics_on_bullying_in_schools_without_uniforms.pdf
    • https://cdn.shopify.com/s/files/1/0445/5848/3620/files/enclave_questionnaire_answers_fallout_76.pdf
    • https://cdn.shopify.com/s/files/1/0448/9605/9547/files/acuerdo_de_paz_con_las_farc_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1562/files/jozebivulaxuvukumuzuxe.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/brain_on_fire_movie_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0434/4469/9288/files/47185732920.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054ed.bin
e596a0c1dbd29432c83e4ab4c3c78282635eb2e2cdc105506d6bf4d871cbed63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54ED 5724 bytes
font_01_sfnt_off000068f1.bin
d24c220efe42ef6aaae5a787fe8824477a757549552a653c7b29a9e8c78f0463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F1 5064 bytes
font_02_sfnt_off00007a3b.bin
c8cb303e765c67f43d6d34f29c1d02953890772ff7b697be779fb29335000f72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3B 6640 bytes
font_03_sfnt_off00008bda.bin
088c6eae6d37f1362a5ad0bc385c95056759ab8bd45e61fcb29e5715c6efe7c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDA 10496 bytes
font_04_sfnt_off0000af70.bin
fe1ca6a691315ef32827512bb86cd3188d7c30cfa02bd4559714794831c9b14a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF70 16684 bytes
font_05_sfnt_off0000c6c8.bin
9cf5d237ae6af822500c4eaacc6009d9e1cdd837c845f87dd4ea40380386b440		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C8 3260 bytes

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