Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5456383bfab6cb…

MALICIOUS

PDF

43.5 KB Created: 2020-08-30 01:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7614ca1de367e5d5a51e3b5ca912acd9 SHA-1: 73106a003389d41b7a6445d39b5b84605650fe83 SHA-256: 8b5456383bfab6cb522fa17c77dc6cd0026b9c2e4322dccef8e5a1177d8d4236
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 SEO-optimized PDF documents hosted on various platforms. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the target URL, suggesting a social engineering lure.

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/wix?keyword=domino%2527+s+pulse+system
    • https://static.usrfiles.com/ugd/b8c837_1b75bd4ce4f7415a8768c37507cc0938.pdf
    • https://static.usrfiles.com/ugd/9374a7_92c1f27958ba4826aff2751c80e57d24.pdf
    • https://static.usrfiles.com/ugd/93971e_e33445354d1844cb8719acccd5bea913.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/nopiletujaropozej.pdf
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/auditoria_fiscal_e_tributria.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/15_sentences_with_second_conditional.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1851/files/top_5_cricket_games_for_android_2019.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6910/files/affidavit_of_loss_sss_id.pdf
    • https://static.usrfiles.com/ugd/b8c837_bafe44b636f941a88a8734836f0c4a9c.pdf
    • https://static.usrfiles.com/ugd/b9801a_527dd94660974ea7a3520abd5c621279.pdf
    • https://static.usrfiles.com/ugd/f0e51d_3275a54ec8ab42b0848127eaaefbc1d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_195e3f0534ea465ca49fba8be2f43f65.pdf
    • https://cdn.shopify.com/s/files/1/0428/9521/2697/files/google_ads_search_certification_answers_november_2019.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1829/files/ziwir.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/rudusodadexipop.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/kifamanum.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006019.bin
7373f4b924c5730777bd1d2d9d673c912de9f3b30203fe718c006dd214e83e0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6019 4676 bytes
font_01_sfnt_off00006ffb.bin
5293e16df3e1f695015fa390391fff2d927bccf7d5a12a76ca1265ed509781f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFB 10424 bytes
font_02_sfnt_off0000931c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x931C 4324 bytes