Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0acf1a7d2c0a6b9…

MALICIOUS

PDF

56.8 KB Created: 2020-07-31 06:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79b1ad77c1c4f0edc43cacb6481ff7d6 SHA-1: 8a6d11007a32d6481dceea10d779dff0c93a94c8 SHA-256: c0acf1a7d2c0a6b9a885af97247328a847e645c9866255541b412b5763600c62
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically flagging a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a syllabus, suggesting a lure. The presence of numerous external PDF links further indicates an attempt to direct users to potentially harmful 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=upsc+botany+syllabus+2020+pdf
    • http://files.doodledogs.org/uploads/1/3/0/8/130814118/wanurete.pdf
    • http://files.seafoammag.com/uploads/1/3/0/8/130813888/1376286.pdf
    • http://files.singplayaudiate.com/uploads/1/3/2/6/132681144/f6d57c55.pdf
    • https://cdn.shopify.com/s/files/1/0439/5037/5070/files/piloda.pdf
    • https://cdn.shopify.com/s/files/1/0434/3542/5944/files/15572458826.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/dajavesugavasemof.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/selavajumimoxogobanus.pdf
    • https://cdn.shopify.com/s/files/1/0437/1592/0024/files/50897315668.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/41578106670.pdf
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/74014731881.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/jimolak.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/30900096572.pdf
    • https://cdn.shopify.com/s/files/1/0429/3997/3788/files/rolodol.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/72077029474.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/dolovikawepobenegipatim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94323725826.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_off0000818f.bin
2d04f8196f71bea5b225e92c31c006c795241a4e57ae0fd32a14c95d73fc46fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818F 5276 bytes
font_01_sfnt_off0000937e.bin
d97e055e11de589539a249dfdf9c15aca1e9caf4700104d1763a3a5d87d8f7f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x937E 2320 bytes
font_02_sfnt_off00009dcf.bin
2598ac2eecc6fee9c638ea1cf9f8ced6627bdf24069ad5b23c844aa33c756c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCF 9984 bytes
font_03_sfnt_off0000bfe3.bin
207faf14306426b668b87aba0c9d447b8ba40b67f0f7b18660ffa0d3c8132265		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE3 16224 bytes

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