Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c27927dbe8e5d5…

MALICIOUS

PDF

56.1 KB Created: 2020-08-08 22:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b05d934e16c8a8c7552f15c1484b52a8 SHA-1: a8e013087f07750701d5587ed822fb31ec5a6684 SHA-256: d0c27927dbe8e5d55075a8433f9463681945c5af1ed9dfb39e1404b43dc77844
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or SEO poisoning attack. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=roots+and+suffixes+worksheets+pdf' which is flagged as a malicious redirector. This redirector likely leads to a payload hosted on one of the numerous Shopify domains also present, which are part of the link farm.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=roots+and+suffixes+worksheets+pdf
    • http://files.georgehi.net/uploads/1/3/2/6/132682048/bujeb_didizetidazipi.pdf
    • http://files.autumncorners.com/uploads/1/3/0/7/130774969/3115405.pdf
    • http://files.humanist-sociology.org/uploads/1/3/1/4/131453560/b1f85.pdf
    • http://files.mothersunite.net/uploads/1/3/1/3/131379320/xokijux_bubebazirobi_diguwivos_befarevizopuwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pekuxiwitijumowiviw.pdf
    • https://cdn.shopify.com/s/files/1/0437/5586/4215/files/nopijuvagabutado.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/69644810215.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/30082952370.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3450/files/mukojenorawizapuvofof.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/list_of_awards_and_honours_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/darimulexivimomasuduxun.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/letter_e_tracing_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/pefeliwaruleredikip.pdf
    • https://cdn.shopify.com/s/files/1/0430/4053/8773/files/galefizojitovafusoja.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3602/files/69331138279.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/engineering_economic_analysis_newnan.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ce2.bin
841fdb585ed576037c74c439fb57e2f621c69375d10e7483d1430f67a17dabd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE2 5328 bytes
font_01_sfnt_off00007f18.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F18 3720 bytes
font_02_sfnt_off00008a73.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A73 1800 bytes
font_03_sfnt_off00009301.bin
8cbab719617680668114c8a3a5fe09d9eb210faba08e5f9be64ff894de43511c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9301 14376 bytes
font_04_sfnt_off0000bfcf.bin
71261d389a7aea7809699a69c948b33e04aef92d8a5e276a01aa359f03dfb0d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFCF 5120 bytes

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