Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8510c58bf477687…

MALICIOUS

PDF

40.2 KB Created: 2020-08-12 13:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd452c020cc89dbc08d0192870d4e317 SHA-1: 55cf648b8a38efb6c4e2a79bbc39b4c2bc03ab29 SHA-256: d8510c58bf477687401bad0190b883c4351893d6449b75711cee7ab89561069a
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=english+to+marathi+dictionary+pdf+free+download+full+version'. This URL is presented within the document body, disguised as a download link for a dictionary. The PDF also contains a link farm, with many links pointing to Shopify domains, some of which are benign. The presence of a download button lure further supports the deceptive nature of the document. No scripts were extracted from this sample.

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=english+to+marathi+dictionary+pdf+free+download+full+version
    • http://files.shandeezcollectiv.com/uploads/1/3/1/6/131606486/baxunu.pdf
    • http://nirumo.mstravelexec.com/uploads/1/3/0/7/130738993/fdd5c9c58.pdf
    • http://files.mrsanntutoring.com/uploads/1/3/1/8/131856539/ruwurorar.pdf
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/honda_ch80_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12584167006.pdf
    • https://cdn.shopify.com/s/files/1/0433/1782/1605/files/wujudelepakebamudi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/apostille_convention.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/3426395403.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/wopexobip.pdf
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/sediaan_apusan_darah_tepi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5559/6198/files/59639635546.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3901/files/11383219759.pdf
    • https://cdn.shopify.com/s/files/1/0435/5027/7783/files/vaviwijuxopukujebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8274/files/kitchenaid_superba_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/5g_fronthaul_backhaul.pdf
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/52909134949.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_off00004ffc.bin
43e185da5d01abf436f21cc01ef2e661011653821df89fe6f3e5c790ca81033a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FFC 5660 bytes
font_01_sfnt_off0000632b.bin
b78524668e596847b4841fe9d1df774de28c05394a09a926ab4b2e99c65d517f
pdf-font-stream PDF embedded font (sfnt) at offset 0x632B 9892 bytes
font_02_sfnt_off00008501.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8501 4324 bytes