Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf959b394210865…

MALICIOUS

PDF

40.4 KB Created: 2020-08-19 12:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49412df29adf561236e60494c23f74ea SHA-1: 4fc87387c3dae1a04c98bb07ae27e3c2027862dd SHA-256: bcf959b394210865cc456fc4e44c4947f0f3ef09fc1b5f99628564244c82e1e5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Samsung latest android version' and includes the malicious URL, suggesting a lure for users. The presence of a link farm indicates an attempt to manipulate search engine results or distribute malicious content widely. No scripts were extracted from this sample.

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=samsung+latest+android+version
    • http://files.enfieldrefugeewelcome.org/uploads/1/3/2/7/132740234/ad6b7ce8eb8d9.pdf
    • http://files.annecrylen.com/uploads/1/3/1/6/131637385/acd2f60701.pdf
    • http://tusiwuti.missvietnamofamerica.com/uploads/1/3/0/8/130813528/koguvenefarifodoju.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/povagifepakizawa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7106/8565/files/tosofamorutepebox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerisorajomowuba.pdf
    • https://cdn.shopify.com/s/files/1/0439/4975/2478/files/gokutezar.pdf
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/sutagugadavinulelov.pdf
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/1443881575.pdf
    • https://cdn.shopify.com/s/files/1/0438/9391/5800/files/9812828584.pdf
    • https://cdn.shopify.com/s/files/1/0437/2122/8440/files/marvel_comics_1.pdf
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/3x3_matrix_inverse.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/dizoxesozu.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_off000060a9.bin
3c17a3b78637ea9234503e9592b29c396a57a02358625fc7b1021227973c7496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A9 5308 bytes
font_01_sfnt_off000072a1.bin
8b486cfe34715118a068c30c28748517dab55a3b80d2fff6a749f73677910efe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A1 10128 bytes

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