Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e3db3bed573fe7…

MALICIOUS

PDF

48.5 KB Created: 2020-08-07 13:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 669f1c3cb07454ec89eb6348ce209b37 SHA-1: 80fea32ae27700737fd901ac4f8e113c2b09a277 SHA-256: 19e3db3bed573fe79f200649ce1d9ae1d2b90c0ac600885c76d7de97bc275ba5
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains commonly used for SEO spam and link farming. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though partially corrupted, contains text related to research PDFs and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent.

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.cc/pify?keyword=definition+of+validity+and+reliability+in+research+pdf
    • http://files.musicmatters405.com/uploads/1/3/0/7/130775109/761e0b4.pdf
    • http://files.creativebn.com/uploads/1/3/1/4/131453021/b11e7f.pdf
    • http://files.singoutasia.org/uploads/1/3/1/4/131437352/3613264.pdf
    • http://bokowetag.gerdesgala.com/uploads/1/3/0/7/130775129/kuzepibivolimuk_kilopulok_paludelapereg.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/finopomatagurugare.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/number_line_integers_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/pojofas.pdf
    • https://cdn.shopify.com/s/files/1/0438/2880/5789/files/67073384176.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/nazumabesative.pdf
    • https://cdn.shopify.com/s/files/1/0430/2949/5959/files/lamekejokofopatovifeji.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/vojizi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8924/8927/files/pafegijurenira.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/92156980881.pdf
    • https://cdn.shopify.com/s/files/1/0441/0313/9480/files/sewing_for_the_apparel_industry.pdf
    • https://cdn.shopify.com/s/files/1/0433/0700/8168/files/driver_s_license_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0557/files/datasheet_lm35.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/53912649713.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_off00007de7.bin
1dac2e3550a1ebdc62307ae005ff7a564bc8f8a8170ed1f5800aadd3fd194413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE7 5544 bytes
font_01_sfnt_off000090cd.bin
025ac435d932b2a1980149176b2f5e84dcb886f4ea1ead4cc52cf09d8212c05a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90CD 10540 bytes

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