Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb50a233d3efc263…

MALICIOUS

PDF

59.5 KB Created: 2020-08-13 02:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75c56ba25b5686ddd65e31f646e4530f SHA-1: 00c4a221e62c1e1c1fea52eed8e8a4b66e02ab71 SHA-256: fb50a233d3efc26302f82d50c9e4f1c9822211f895feaa8ad7a58f9564e21c62
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 external PDF files hosted on various domains, including a known malicious redirector. The document body, though heavily obfuscated, contains the URL to the malicious redirector, suggesting an attempt to lure users to malicious content under the guise of providing academic or technical documents. The heuristic firings confirm the presence of a malicious redirector link and a link farm, indicating a phishing or SEO poisoning attack.

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/pify?keyword=annalen+der+physik+english+pdf
    • http://files.sweetwoodilstudies.com/uploads/1/3/1/3/131380741/776202.pdf
    • http://rezegi.moosemanormi.com/uploads/1/3/1/1/131164250/bekixisofe.pdf
    • http://files.kol-tzedek.org/uploads/1/3/1/4/131438453/2997a5d.pdf
    • http://files.discountwiresupply.com/uploads/1/3/1/4/131411688/7bc68.pdf
    • http://files.texasangiesadventures.com/uploads/1/3/1/3/131397973/74c108131b86.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/hesston_540_round_baler_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/87476045918.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/98931317695.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/kinixujobowufabodaj.pdf
    • https://cdn.shopify.com/s/files/1/0427/7331/5740/files/64156778616.pdf
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/naravemanedasowamaka.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/mewexatagunogezotonijuke.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4314/files/ariston_electric_water_heater_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0430/8172/8151/files/47740480503.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8032/files/48290360335.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0099/files/safuwikobetiva.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/47983837682.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/kinukaziv.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_off00009bac.bin
f39d89d4cb8d42975b88ba98d815191b6a34813a6707a3735921aea03623cdfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAC 5056 bytes
font_01_sfnt_off0000acc6.bin
6c5ec457b8609da710a2f303ada11b14ce0b18a73000e0404a530abbd09ab374
pdf-font-stream PDF embedded font (sfnt) at offset 0xACC6 11144 bytes
font_02_sfnt_off0000d132.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD132 4324 bytes