Malicious PDF — malware analysis report

Static analysis result for SHA-256 47740ef9d59ac66a…

MALICIOUS

PDF

68.9 KB Created: 2020-08-26 09:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c553748fdecf11fdcc0c894be644fd26 SHA-1: 1efe3a4e0076f15a74aeba4909353095911c6d2a SHA-256: 47740ef9d59ac66a5dbad65cff878d6199aaaac0d35a61cacd0b327ad4f5d25b
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body, though heavily obfuscated, contains a reference to 'pokemon emrald gameshark codes', likely a lure to entice users to click the malicious link. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=pokemon+emrald+gameshark+codes
    • http://wukeja.nawratseymourhr.com/uploads/1/3/1/4/131438405/1302014.pdf
    • http://kuvugotu.musictalentofcleveland.org/uploads/1/3/2/7/132740435/veworidovaxenek.pdf
    • http://files.adrians411.com/uploads/1/3/0/7/130775528/migadij-perajubaxamow-suxuka.pdf
    • http://simip.lifemowercounty.org/uploads/1/3/0/7/130775403/4693466.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/28638908861.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/ssh_config_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/zuxozefojapegofawuto.pdf
    • https://cdn.shopify.com/s/files/1/0446/4807/1331/files/jofoxutagujin.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/34079307609.pdf
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/72054319008.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/77139762054.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/6533439853.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/37950788738.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/nowoxobuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/1370/0764/files/manitalebumixidixora.pdf
    • https://cdn.shopify.com/s/files/1/0437/7391/9393/files/straight_bill_of_lading_template_canada.pdf
    • https://cdn.shopify.com/s/files/1/0434/4794/3330/files/desperate_housewives_script.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_off0000c2ab.bin
c5b3194606d083ff3cb5859ab51867390bcc7dd11d4dd75bd9cddeecc836a311		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AB 5420 bytes
font_01_sfnt_off0000d4e1.bin
d1070593e5ae61bbd1ecf03ce2935417120397bd1cf4f5675f7f702740ee3e38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E1 15876 bytes

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