Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c15ade5017813a…

MALICIOUS

PDF

39.3 KB Created: 2020-08-04 11:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b136462536f7f26502e11cd06461612 SHA-1: d91bccfaaf83c3036ab7ef53999686d0697bd9cb SHA-256: 22c15ade5017813ad860eb2b61bc2adbff9f6d726b2c34c133916b6a6b5c2739
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, masquerading as an application letter sample, to a redirector URL. The primary malicious link is https://ttraff.com/pify?keyword=applications+letter+sample+pdf, which is a known malicious redirector. The document body is heavily obfuscated and contains numerous embedded URLs, many pointing to Shopify, likely as part of a link farm to improve SEO for malicious content.

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=applications+letter+sample+pdf
    • http://files.solodarchi.com/uploads/1/3/1/1/131164157/podumu.pdf
    • http://files.candleandbodyshop.com/uploads/1/3/2/7/132741334/4150313.pdf
    • http://files.theforest.co.in/uploads/1/3/0/7/130776485/futupitupetonesoko.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/norafolibogawajudubir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8145/8069/files/82513707765.pdf
    • https://cdn.shopify.com/s/files/1/0448/2197/1104/files/purple_skull_trooper.pdf
    • https://cdn.shopify.com/s/files/1/0436/7951/4777/files/repair_manual_270962_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8069/files/45608734368.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/jaboriponetuvo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/futatupe.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9195/files/dofemamapufutemife.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/68499507328.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/78633108736.pdf
    • https://cdn.shopify.com/s/files/1/0434/1668/2663/files/49874732071.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/66121060647.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_off00005d19.bin
370be73e73f565783b098d37e4dcc841c8a0ca70fc8656cc54901d911b16d1ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D19 5288 bytes
font_01_sfnt_off00006efe.bin
64fc8b7829f288918fc5a7487af9d7eae60dd50ddb23057a247c20d85e56d6fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFE 9824 bytes

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