Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abd99c65c0566dc…

MALICIOUS

PDF

44.6 KB Created: 2020-08-07 17:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9229b4111649ad5246e0d7b940144fe5 SHA-1: 051ae24e393d39886c72c4f11ae098cef9f02e71 SHA-256: 8abd99c65c0566dcf5a9a4d17bcad994ad0fcd79cb50b360ec5f85f5b2784775
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a malicious redirector, indicating an attempt to lead the user to a malicious site. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword suggesting an academic resource to entice clicks. The document body, though heavily obfuscated, contains references to the same academic topic and the malicious URL, reinforcing the lure. No scripts were extracted, but the PDF structure itself is used for the malicious redirection.

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.com/pify?keyword=grade+9+english+module+4+anglo+american+literature+pdf
    • http://fifesek.manisha-sharma.com/uploads/1/3/1/4/131437246/wopukobof_bijekam_bowetusumivulaj_pijekixotuwezur.pdf
    • http://files.acornabilityclinic.com/uploads/1/3/1/4/131409074/710be2.pdf
    • http://files.chicagoland4x5.org/uploads/1/3/1/4/131453100/bamomanurub.pdf
    • http://files.medoratrevilianattire.com/uploads/1/3/1/4/131483955/978717.pdf
    • http://files.swirlcupcakes.org/uploads/1/3/1/3/131380029/7687389.pdf
    • https://cdn.shopify.com/s/files/1/0434/6960/2981/files/sifasivirerujel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5732/3933/files/69761405859.pdf
    • https://cdn.shopify.com/s/files/1/0429/2434/3462/files/free_ford_windstar_wiring_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0433/6146/8567/files/58632088782.pdf
    • https://cdn.shopify.com/s/files/1/0440/7289/4629/files/40131615724.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/97721658035.pdf
    • https://cdn.shopify.com/s/files/1/0434/5158/0568/files/54767939145.pdf
    • https://cdn.shopify.com/s/files/1/0436/3167/3504/files/reagan_killer_mike.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/rimerenoxolukipizoxi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/sizisukugezilitagug.pdf
    • https://cdn.shopify.com/s/files/1/0435/4116/8283/files/42659356281.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/xemezimisizava.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_off00006ce1.bin
635a3bad4ae1daf84745b0c8b3a54dae4329d0d1c526785820bebc2137901b2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE1 5844 bytes
font_01_sfnt_off000080a4.bin
21866eeeae61301fd14f5d7d6674877db86be03f140fc3a25b1cbfe1c4706f83
pdf-font-stream PDF embedded font (sfnt) at offset 0x80A4 10588 bytes