Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0bf36798787002c…

MALICIOUS

PDF

60.0 KB Created: 2020-08-01 12:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7326e75aadbefb1adbc1b74acd4d3f71 SHA-1: 6bf765bda08c78798d5389a0236a197cec041599 SHA-256: a0bf36798787002cf3673605fcd8360ff25993c50140232e373f7462e7526a56
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Romance of the condor heroes' and the wkhtmltopdf application, suggesting a lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The presence of many PDF links points to a link farm strategy.

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=romance+of+the+condor+heroes
    • http://files.schombergcommunityfarm.ca/uploads/1/3/1/3/131380868/c3c31a37f78ec7.pdf
    • http://files.wao-lb.com/uploads/1/3/1/1/131163959/wibakidixirifebones.pdf
    • http://files.ethanrmarshall.com/uploads/1/3/0/7/130739542/612a2e28644133.pdf
    • http://files.boutiqueofisanti.com/uploads/1/3/1/4/131407737/bolesotediwisi_sexupuru.pdf
    • https://cdn.shopify.com/s/files/1/0429/6110/9155/files/88242996205.pdf
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/kexenulagulagilekalun.pdf
    • https://cdn.shopify.com/s/files/1/0429/0743/5167/files/pitejozojinupenesezigenuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/mujubetatejigig.pdf
    • https://cdn.shopify.com/s/files/1/0430/5161/4359/files/74086888336.pdf
    • https://cdn.shopify.com/s/files/1/0430/4781/3269/files/13648352282.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/80939789795.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vakijuxek.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/4538024973.pdf
    • https://cdn.shopify.com/s/files/1/0435/3468/0216/files/xogajiwopez.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000667e.bin
0dc41bb161799d2d25d2af3b8d3cd3e8e2eddcc4d1841cf308cbdca3993832f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667E 11328 bytes
font_01_sfnt_off00008b8c.bin
fe5d6dbe24470b0d1a30ef7478cbb672bb5d7092bcb4053474e659b59498e335		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8C 5236 bytes
font_02_sfnt_off00009d26.bin
f8051f7d017f59c3d2e5fcf1d1611c603ca8a17ec8e1cd98d980d02d947925ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D26 8940 bytes
font_03_sfnt_off0000b67a.bin
ad71bd58878461ba3c7aa563e98821a4d227a7ee6d0b946756d233b40f2832bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB67A 13380 bytes

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