Malicious PDF — malware analysis report

Static analysis result for SHA-256 294500d925963d14…

MALICIOUS

PDF

39.2 KB Created: 2020-08-20 21:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98d14ed446a767c4f49024567be24ee5 SHA-1: ac984528af5a0ecfff4c7bfb4fc8ac973ed6a1ac SHA-256: 294500d925963d145d55223314fdc8f6a6494fc9c39ff2848e378a20cc85e42c
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with 30 generated links pointing to external PDFs. One of these links, 'https://ttraff.ru/pify?keyword=brother+song+status', is identified as a malicious redirector. The presence of a visual download button further suggests a lure to entice user interaction. The overall pattern indicates a likely SEO link farm or a redirection scheme to malicious content.

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=brother+song+status
    • http://files.torontoislandlakeswim.com/uploads/1/3/1/4/131407493/06958cf889715c6.pdf
    • http://files.awardsink.com/uploads/1/3/1/4/131453124/6759168.pdf
    • http://files.amadauniversity.com/uploads/1/3/0/7/130775084/tikefowofoletuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7727/9652/files/bezexivivizewurikinijiju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pinabazebovo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3825/0910/files/how_to_remove_java_from_mac.pdf
    • https://cdn.shopify.com/s/files/1/0435/7931/0239/files/57064239608.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52209678420.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/multivariate_normal_distribution_scipy.pdf
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/analytical_methods_in_economics.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/71762093881.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/97782573777.pdf
    • https://cdn.shopify.com/s/files/1/0432/4959/8632/files/algebra_1_chapter_7_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/1241/3851/files/kojuzuvivovewebavaso.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/sufexuriniwaxo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9504/6824/files/mesozonefavavapibudexulew.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_off00005cf9.bin
4b4f1353d2a728694619916107b209def2337e5d94a0944c2237745b0ea683bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF9 4964 bytes
font_01_sfnt_off00006dd5.bin
9abf07df98079eeb171ef200add2038fff64925ee8c1070ff19ab4c4efb4fec7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD5 10096 bytes