Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef4b4717a5f47c3…

MALICIOUS

PDF

49.0 KB Created: 2020-08-20 23:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c2f1755dbacc0d7792f13fe0047bd88 SHA-1: cbafed0d85829c3e9ecab4312eb122f6897fb529 SHA-256: 3ef4b4717a5f47c34f6e1b260313385f63fdb8fa6469617fb04ebafaad1c576e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF contains a link disguised as an Adobe Flash Player update, which is a common social engineering tactic to trick users into clicking malicious URLs. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms that the primary URL leads to known malicious infrastructure. The PDF also contains a large number of other links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a broad distribution attempt. The embedded document body text, though heavily obfuscated, contains the target URL and keywords related to the lure.

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=adobe+flash+player+linux+debian
    • http://files.copperpondlodge.com/uploads/1/3/0/7/130739758/wuradatep-samumarubon-zabubur.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6361/files/nutemibosepoxunewidorit.pdf
    • https://cdn.shopify.com/s/files/1/0432/9514/6139/files/celiakia_u_dzieci.pdf
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/65725237921.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/anatomy_of_flowering_plants_class_11_ncert_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gowaluzefep.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/fopudavu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/xufobipukizape.pdf
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/raroxeridufukelakupi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7777/files/taregegiti.pdf
    • https://cdn.shopify.com/s/files/1/0428/7817/3343/files/citric_acid_cycle_regulation.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitadekekogog.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/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ed.bin
3fc593190384266c7534dda259d6759db982da85de20b2a4efbf9aa86f943f79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73ED 5228 bytes
font_01_sfnt_off000085a6.bin
d103fd2d27034d64d8babc2343a1656f2beb05d00f090865999a8f21dc7bf897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A6 10328 bytes
font_02_sfnt_off0000a8ea.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8EA 4324 bytes

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