Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca651102b4c5dba5…

MALICIOUS

PDF

62.1 KB Created: 2020-08-15 04:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42813ea520df2f66734891ac3e3c002a SHA-1: 59d62d7f99a15f7f801ca1f234c1799d0775ea46 SHA-256: ca651102b4c5dba5f09cbff623b5d1f685da4c4b980f5930a11bd840964bb543
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.ru/pify?keyword=bangla+natok++for+mobile'. Another critical heuristic identified a PDF link farm, with many links pointing to shopify.com domains, suggesting an attempt to obscure the true malicious destination. The document body contains garbled text and the same URL found in the heuristic, reinforcing the malicious intent.

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=bangla+natok++for+mobile
    • http://files.lastcallexperience.com/uploads/1/3/1/3/131383823/suduzuwate-pegewarufedik-gajofapotuwuxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/wulifipesomezorigoma.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/blank_fretboard.pdf
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/lobazibesonogezade.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/10383804412.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/dezerodome.pdf
    • https://cdn.shopify.com/s/files/1/0437/0091/2278/files/20540736571.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/buguxij.pdf
    • https://cdn.shopify.com/s/files/1/0440/5841/1158/files/3ds_max_2010_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/tuxizer.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0132/files/27863835771.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044e2.bin
fea6f7b769bfa93675488facc69f8c987e0a75ba1723a67a37bb76318d096515		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44E2 5164 bytes
font_01_sfnt_off00005662.bin
ae56296c27db75a79d195cd39630c1dca51f777af028198afbd48c97d20c3bbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5662 8744 bytes
font_02_sfnt_off000072a3.bin
a11cbbdc166f92546687c2d8767e460e8a254e098bcee6490d99ed0ab01fa7ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A3 16752 bytes
font_03_sfnt_off0000a5fa.bin
c31aa3456a095714e0d37afbe9fd86ba1361dd5f75c58678e5c2c1d035892804		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5FA 13892 bytes
font_04_sfnt_off0000d17a.bin
22b36108848ed5908722c498ad1de75c0840765bebc1d75468b7960e83bcf03b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD17A 16640 bytes

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