Malicious PDF — malware analysis report

Static analysis result for SHA-256 345e762eef5f5d10…

MALICIOUS

PDF

54.0 KB Created: 2020-08-16 17:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d4cf3e9aa7f9d82dcabb7e2b938d369 SHA-1: 3fbeecb09cba2b7a79c69f1def2d6f121d17b444 SHA-256: 345e762eef5f5d10fa26d78239ba4b870d55c3843e87580a4c18dba584bb58a6
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Scottish ceilidh dance music free' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, reinforcing the assessment that it is designed to redirect users to harmful content.

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.cc/pify?keyword=scottish+ceilidh+dance+music+free
    • http://files.germane2germaine.com/uploads/1/3/0/7/130739986/6799a54e6e6af.pdf
    • http://files.redmoonpathways.com/uploads/1/3/1/6/131637099/c7e2f738f2e1.pdf
    • http://serugu.manhattanmentalhealthservices.com/uploads/1/3/1/4/131437089/2252199.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/table_top_desk.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3929/files/56455534808.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/lds_permission_slip.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/mah_cet_2020_result_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2141/0210/files/98875825579.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/18611501383.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/37773128989.pdf
    • https://cdn.shopify.com/s/files/1/0439/4372/3163/files/72637833612.pdf
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/arm_assembly_language_programming.pdf
    • https://cdn.shopify.com/s/files/1/0429/2260/6759/files/62290554643.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/talemumomumen.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/43667493994.pdf
    • https://cdn.shopify.com/s/files/1/0448/5742/6081/files/thomas_calculus_10th_edition_solution.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_off00007303.bin
0499cfba20260a5fca46dc79723952d6a86b4a3629634be8073363c824518ff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7303 6756 bytes
font_01_sfnt_off00008a1b.bin
c086fb6a6690e791aeb366e6bb0a8b5899ac00759548e7e1c3bfe39e38564fe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1B 5364 bytes
font_02_sfnt_off00009c10.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C10 1800 bytes
font_03_sfnt_off0000a49e.bin
55eea2d9a97845a1c0a1e717d9c1305afa9cffc4dcd7baecf291795ff1fa0584		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA49E 11308 bytes

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