Malicious PDF — malware analysis report

Static analysis result for SHA-256 4964fa3d2a44ec25…

MALICIOUS

PDF

42.4 KB Created: 2020-08-14 18:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e41d2fac76c42111552d8f3d3c69f6a8 SHA-1: 213637d696ac0dea1e94badfeb0a73e1a5b16b51 SHA-256: 4964fa3d2a44ec257505763ace637af29dbbad8f0e857e025845cc6e1fb2ee59
130 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.ru. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a registration form. The presence of numerous external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning attempt to increase visibility of the malicious redirector.

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=du+b.+ed+registration+form+2019
    • http://milefux.andavis.co.uk/uploads/1/3/1/6/131606479/baluvamiregevov.pdf
    • http://files.winnipegcrimestoppers.org/uploads/1/3/0/7/130775652/1237594.pdf
    • http://burobo.saramelodyart.com/uploads/1/3/2/3/132302815/penaridok.pdf
    • http://files.brave458.com/uploads/1/3/0/7/130740530/1a547351fac9.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/kigogevojupebakigarat.pdf
    • https://cdn.shopify.com/s/files/1/0432/5264/6050/files/mefodalowaxitoninot.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1285/files/boxivetewaxuzegereve.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1409/files/11266498127.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0471/files/92981417653.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/king_of_the_ring_1994.pdf
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/zifolunubotisoloj.pdf
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/sipenofidesavanikojajaxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/pokemon_showdown_teams_ou.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/fikowudemibezepisigofage.pdf
    • https://cdn.shopify.com/s/files/1/0438/8497/0139/files/73826481092.pdf
    • https://cdn.shopify.com/s/files/1/0431/1993/5655/files/81189512382.pdf
    • https://cdn.shopify.com/s/files/1/0440/7921/8840/files/29190499876.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/
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/fikowu

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006514.bin
45b3a85d1e1efa985e9cad5330dfdd3fed6a220bba7bc47de7918ac6a13eb3f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6514 5848 bytes
font_01_sfnt_off000078e4.bin
20d99c0c3700d459ffd4bf1183fd2accce3c0e034e4cdf14cca3ebd0a96473ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E4 10480 bytes