Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9c5e3ceeb21aae…

MALICIOUS

PDF

33.2 KB Created: 2020-08-08 18:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59a52a2b8ca2e678922115f46fdb2884 SHA-1: f6c26be8939b2b0d15866adc9721414f188b6bb1 SHA-256: ab9c5e3ceeb21aae576afd38723933e6700bd4e0a76c356307dc78f8b7ede243
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure, which includes a large number of external links. One of these links, 'https://ttraff.com/pify?keyword=accel+world+light+novel+english+pdf+download', points to a known malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting it's the primary lure. The file's purpose appears to be to redirect users to potentially harmful content through this link farm.

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/pify?keyword=accel+world+light+novel+english+pdf+download
    • http://gegovan.mirabaipeart.com/uploads/1/3/0/8/130874207/pomagigek-lixez.pdf
    • http://files.uoflelsb.org/uploads/1/3/0/9/130969440/xofiguvekidubim_saluretojuvun_xajarewoba_dozolexamalowem.pdf
    • http://files.seniorbenefithelp.com/uploads/1/3/1/3/131379268/5378389.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/44616460407.pdf
    • https://cdn.shopify.com/s/files/1/0437/7424/7069/files/sojujutelefizugom.pdf
    • https://cdn.shopify.com/s/files/1/0434/1438/8888/files/xinivetegebobavofosijokos.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/13898056656.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/black_flame_ds3.pdf
    • https://cdn.shopify.com/s/files/1/0439/7685/1614/files/libros_para_aprender_ingles_basico.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/47698979207.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/64304747936.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9854/files/simagu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/xurulizatusu.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_off00004262.bin
e740229b6093db2e864d8ece3fa91d6ebb1b974efe81255ef4067aa58f503e9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4262 5560 bytes
font_01_sfnt_off0000555d.bin
6574d58d7b96ca6915d8572c5fa95d3fd9d4fe90cc53012e683e5f37738ef5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x555D 10168 bytes

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