Malicious PDF — malware analysis report

Static analysis result for SHA-256 598798f65d97217d…

MALICIOUS

PDF

40.0 KB Created: 2020-09-10 00:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a9db4bc79e1515ff2cd82d62c9a5f07 SHA-1: cf2c58839c5dbec3a6531ce681cfb2aab85e23d4 SHA-256: 598798f65d97217db30812268ef60fa0e38c074bb2c2040c41e20f38953492a0
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though partially corrupted, contains text related to 'Annoying insect crossword answers' and includes a URL that appears to be a lure. The PDF also exhibits characteristics of a PDF_SEO_LINK_FARM, suggesting it's part of a larger scheme to distribute malicious links. The primary malicious URL identified is https://ttraff.me/wix?keyword=annoying+insect+crossword+answers, which likely serves as a redirector to further 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.me/wix?keyword=annoying+insect+crossword+answers
    • http://files.pcrws.com/uploads/1/3/0/9/130969160/mijejivadukizogipuge.pdf
    • http://files.325986690869568534.com/uploads/1/3/0/8/130814280/sapeluvapej.pdf
    • http://files.rochellelucey.com/uploads/1/3/1/0/131070469/8384719.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/for_loop_php.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/chez_nous_fourth_edition_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6774/files/bse_odisha_8th_class_book_download.pdf
    • https://static.usrfiles.com/ugd/5ecadc_4bc92536f91d49db98bcf7a16be927e3.pdf
    • https://static.usrfiles.com/ugd/cec570_0d168e3fc0e94641a65b07d74f070f2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_83c94c35d1d04a19bc32a8329cb88f04.pdf
    • https://cdn.shopify.com/s/files/1/0434/0196/9820/files/wordly_wise_3000_book_5_lesson_6_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0460/6951/4404/files/analiticka_hemija_knjiga.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6695/files/gimamesediriniwi.pdf
    • https://cdn.shopify.com/s/files/1/0441/2460/2520/files/2020354527.pdf
    • https://cdn.shopify.com/s/files/1/0438/4659/8816/files/rubujokusolujetuduz.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_off00005e52.bin
db464891e8e1e00e59f500f1e7d0d3013876f303f98cd900c48f805f480e19e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E52 5260 bytes
font_01_sfnt_off00007063.bin
ddf990a715be49ede4a8a211505badbba38ac1f91c1e3ca24c88d26f04c80ee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 10140 bytes

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