Malicious PDF — malware analysis report

Static analysis result for SHA-256 9188cf48e3b11215…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 13:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b1bf57b1c3c2bb086c33c6c628693c7 SHA-1: 73c2b77bad7a0a3cc164791013304555a8250e6c SHA-256: 9188cf48e3b11215ff55f67837b1669b1f00a3db340d5dfaf7658056dd1ddcdb
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure. The document body, though partially corrupted, contains text related to 'convert celsius to fahrenheit android app', likely a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL, which is used to funnel victims to 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.cc/pify?keyword=convert+celsius+to+fahrenheit+android+app
    • http://files.eyegum.org/uploads/1/3/2/6/132680781/76b5480f305c.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/nuvugugunuruvakejonejid.pdf
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/canada_post_lettermail_rates_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gegexovikorojirokelaxedu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1841/1417/files/sakogomel.pdf
    • https://cdn.shopify.com/s/files/1/0435/3572/8794/files/luvuforagilofaxom.pdf
    • https://cdn.shopify.com/s/files/1/0430/3916/2522/files/jaxis.pdf
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/baron_emotional_quotient_inventory_youth_version.pdf
    • https://cdn.shopify.com/s/files/1/0437/4816/3733/files/bass_guitar_chords_sheet.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_off00005aa7.bin
4046fe3a922f75e03af5ec6520a57b4d850838578122e7bc1466e05593c258df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA7 5208 bytes
font_01_sfnt_off00006c5c.bin
174bf6b7b3798d44cb232aa74964c4dbe217b22cad24e60a68099e113efb53d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5C 14104 bytes

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