Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca9e7bbc67291905…

MALICIOUS

PDF

41.7 KB Created: 2020-08-06 17:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 517e2dcbcd40872da0d7a3c751aa0618 SHA-1: e0ac479e4e4ad87bf8cfc2cff4b4cf1a3bc8ee67 SHA-256: ca9e7bbc672919051371547c3734f7f316ead99ce523847fa3110498ede686b8
120 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link and a large number of external PDF links, indicating a link farm strategy. The primary malicious URL identified is https://ttraff.cc/pify?keyword=bacterias+anaerobias+facultativas+pdf. The document body contains obfuscated text and embedded URLs, consistent with attempts to lure users to external sites. 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.cc/pify?keyword=bacterias+anaerobias+facultativas+pdf
    • http://files.kerrionmission.com/uploads/1/3/2/6/132681452/wepodamus.pdf
    • http://files.tenstringedlyre.com/uploads/1/3/2/6/132681488/ac0c1d1.pdf
    • http://files.msbutchersclassroom.com/uploads/1/3/1/4/131406841/vofawojolu_vodovatuf_gakisaxezoxem_kuzozuluzenubi.pdf
    • http://files.seagrasspottery.com/uploads/1/3/1/8/131860479/22ae729c5e.pdf
    • http://files.abivaonlineresources.com/uploads/1/3/0/8/130813612/fa0ba13b4e.pdf
    • https://cdn.shopify.com/s/files/1/0428/6011/8175/files/53634709384.pdf
    • https://cdn.shopify.com/s/files/1/0437/9482/5376/files/tokaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/8632/2593/files/32843771755.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/zufefizukomarofedinidejon.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/rifaxavosiresugakuxob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/nazeni.pdf
    • https://cdn.shopify.com/s/files/1/0431/7069/3284/files/44256274420.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nadogenomaxijedunebenez.pdf
    • https://cdn.shopify.com/s/files/1/0436/4845/0718/files/buwita.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/the_wolf_of_wall_street_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0429/0261/8278/files/exceptional_c_herb_sutter.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_off000064a9.bin
f0c40356296b31a83ea1900c9f1fc7a4c98fce44ab59ff0f1e13670f0a5793cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A9 5400 bytes
font_01_sfnt_off00007716.bin
69e0d2429e8edb4aec6a76f1d1c82dcf2d14cc0f67fac418c50a0b453c7c7300		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7716 10152 bytes

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