Malicious PDF — malware analysis report

Static analysis result for SHA-256 331a9dbb1a15ae37…

MALICIOUS

PDF

82.7 KB Created: 2020-07-09 20:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68f1026b350b828a62e74010b7f5aecb SHA-1: 32bb85fe4bd7e2bb03acc3a03404b97c8d9a3f8f SHA-256: 331a9dbb1a15ae37b2516c73c8bddd32d12c4d8fefb272faab53f41ec377cf21
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to redirector domains or link farms. The primary heuristic indicates that the document links to known malicious redirector infrastructure. The document body text, though partially obfuscated, contains a URL that is also present in the heuristics and IOCs, suggesting a lure to download further malicious content.

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/wb?keyword=database%20systems%20design%20implementation%20and%20management%20coronel%20pdf
    • http://files.sanblastoursislands.com/uploads/1/3/2/6/132695195/fimegupum.pdf
    • http://files.originalsexyslave.com/uploads/1/3/0/9/130969004/ca2abe.pdf
    • http://files.kansasactioncoalition.com/uploads/1/3/0/7/130738806/nisezoroki.pdf
    • http://files.co-opurbana.com/uploads/1/3/1/3/131383553/50e504ba.pdf
    • http://files.justpoogie.net/uploads/1/3/0/7/130776558/petanadu.pdf
    • http://files.raglandclay.com/uploads/1/3/1/3/131383588/darovimenon_sokaretulozi.pdf
    • http://files.jenniferbelphotography.com/uploads/1/3/1/4/131483185/4f650169b2d9.pdf
    • http://files.haggartbelting.com/uploads/1/3/2/6/132696109/lixusojow_loxojobanox_dazetafamijuw_sezufufat.pdf
    • http://files.texashollandlops.com/uploads/1/3/1/3/131379371/7953459.pdf
    • http://files.historyunderground.us/uploads/1/3/1/3/131398000/bedufujarum.pdf
    • http://files.woodyshticks.com/uploads/1/3/1/3/131379612/ritozo_luwubuvilul_bizifodoli.pdf
    • https://zalisit.files.wordpress.com/2020/06/45208799547.pdf
    • https://jibawukaj.files.wordpress.com/2020/07/wanaweronutegifi.pdf
    • https://kugigoke149047822.files.wordpress.com/2020/07/vezovonuganadalok.pdf
    • https://bitepon.files.wordpress.com/2020/06/23906904467.pdf
    • https://tazudumo.files.wordpress.com/2020/07/losimogebidigi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gojifazuxosupimuron.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rinajimakonewob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74535711799.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95181885481.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.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_off0000fc43.bin
08973f788880272b7223669799d6b91c906cf0471ccfe09f4e7541220ed9175b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC43 5504 bytes
font_01_sfnt_off00010eda.bin
437012ae86106b8ec9933f30331eed5e5f7491ad6ca2e842b40d13be76594ab7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDA 15064 bytes