Malicious PDF — malware analysis report

Static analysis result for SHA-256 7528b7fadaa7d6f4…

MALICIOUS

PDF

92.7 KB Created: 2020-07-15 13:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9582ea50f8f180c3054e28829f44a669 SHA-1: a03aae3cc7bf12d5af2e929f7fb66334535fedfe SHA-256: 7528b7fadaa7d6f4f3b8ad3729a00984bf06bfe8d9b0e5c7dfbc13bbff413f8c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains and other unknown hosts, indicating a link farm designed for SEO manipulation or phishing. One critical heuristic firing confirms a link to known malicious redirector infrastructure at 'ttraff.ru'. The document body is heavily obfuscated and appears to be generated content, further supporting the malicious intent of redirecting users to potentially harmful websites.

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.ru/wb?keyword=expos%C3%A9%20sur%20le%20volcanisme%20pdf
    • http://files.thesalonportals.com/uploads/1/3/0/9/130969938/sagosati-sivejozafimo-lukobaruwaf.pdf
    • http://files.cidercottage.com/uploads/1/3/1/3/131379059/sidasuzula_mopaku_gilafofivoj_titenilupo.pdf
    • http://files.profile-360.com/uploads/1/3/1/6/131606819/faxomogakapemudonuru.pdf
    • http://files.cantonliterarymanagement.com/uploads/1/3/0/7/130776542/kapekug.pdf
    • http://files.pinescitybaptistchurch.org/uploads/1/3/1/8/131871850/4388892.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/zumusatupipixafiwez.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/41131511300.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/wepomufaguxedizebaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/42751842497.pdf
    • https://lijopiwa.files.wordpress.com/2020/07/xetagalapalekez.pdf
    • https://zegikoduna.files.wordpress.com/2020/06/7191772268.pdf
    • https://fokafogamis.files.wordpress.com/2020/06/31274060758.pdf
    • https://sesuxegu.files.wordpress.com/2020/06/74668540217.pdf
    • https://ribodijexob.files.wordpress.com/2020/07/84707179972.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/71302208931.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/zalitolelariporidowof.pdf
    • https://cdn.shopify.com/s/files/1/0432/1699/4466/files/wobak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/notoxumibabinidalizumazu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4969/files/silofa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4693/files/guxagigogegesez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11085861466.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_off000121ce.bin
eff100d8f1dfb74843b100c95d199458a3b9048eec5320cd639cff0e100c47b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x121CE 5332 bytes
font_01_sfnt_off00013390.bin
2b88f1e6170168b043ed30a1dc1319850e0166b0f84225b4dd9f1dc69455b324
pdf-font-stream PDF embedded font (sfnt) at offset 0x13390 15396 bytes