Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b289cd76013a46…

MALICIOUS

PDF

40.4 KB Created: 2020-08-15 20:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3df466a824f991432895272117d02498 SHA-1: abc1649e41adfe0344142f4dd4901bcc36a3804e SHA-256: 44b289cd76013a46ac74af78632980590a0e33209548e6d46eef0219cf602c87
122 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external PDF files hosted on various domains. One URL, 'https://ttraff.cc/wb?keyword=basic%20life%20support%20(bls)', is flagged as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a tactic to manipulate search engine results or distribute malicious content. The document body is unreadable, but the heuristics and numerous URLs strongly suggest a link-farming or redirection attack.

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/wb?keyword=basic%20life%20support%20\(bls\)%20provider%20manual%2015-1010%20pdf
    • http://ditoxosut.msckylesportsforspecialneeds.com/uploads/1/3/2/3/132302780/1567365.pdf
    • http://files.eaglecreeklavender.com/uploads/1/3/1/3/131398250/lopojurani-bikani-donugobujurulot-kugozetuxazal.pdf
    • http://files.ekstasis.org/uploads/1/3/0/9/130969723/fepogisuridizetax.pdf
    • http://files.susanemshwiller.com/uploads/1/3/0/8/130813111/fupodu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/acuerdo_de_paris_completo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/navewepenizuwuleromaj.pdf
    • https://cdn.shopify.com/s/files/1/0438/8893/5067/files/32062593047.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/amsco_apush_chapter_26.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdf
    • https://cdn.shopify.com/s/files/1/0433/8139/1514/files/bijadopodavabug.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3295/files/wutow.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/mipizotejuni.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/2545102322.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/80894907228.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/82588957618.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_off00004e0e.bin
c80de2e8a3b5b9c37ce8dc9081a16eae82e9ca5365895e799205bd6d111fa2a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E0E 5936 bytes
font_01_sfnt_off00006240.bin
627237efe2c9f30ad6eafd249cc4310dc35f938844b2aff16299435360f7ccb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6240 10552 bytes
font_02_sfnt_off00008656.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8656 4324 bytes