Malicious PDF — malware analysis report

Static analysis result for SHA-256 72050e823d7ed084…

MALICIOUS

PDF

48.8 KB Created: 2020-08-21 23:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9448b5679fe4f9315a8bbcac6194b219 SHA-1: a05a0ddfcf955170c1d67ca48120600cc88fec52 SHA-256: 72050e823d7ed0848510a87ad8ff2a77d275d57ca292600dc5e72dc7859df869
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'marketing research techniques' and includes the malicious URL, suggesting a lure for an advance-fee scam. The presence of many external PDF links further indicates a link farm used for SEO manipulation or to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=marketing+research+techniques+pdf
    • http://pilijo.mark-it-pink.com/uploads/1/3/1/3/131398125/0242b30.pdf
    • http://files.nesot.org/uploads/1/3/1/4/131437806/gabulamid.pdf
    • http://files.alexarainewright.com/uploads/1/3/1/6/131606569/395464ca64.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3604/9571/files/application_letter_semi_block_format_sample.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9406/files/non_verbal_reasoning_analogy.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/93887119246.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/vumumijepasivababafipi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7967/files/houghton_county_snowfall.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2614/files/4904997694.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/94764644845.pdf
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/wuripefitudimepigad.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/82277836114.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/eclinicalworks_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0113/4747/files/hash_functions_in_cryptography.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/xvid_codec_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/9890/5507/files/3004762782.pdf
    • https://cdn.shopify.com/s/files/1/0432/7355/2028/files/fotixusijajesisom.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008126.bin
b7bd96f6c3af0111f244c1cacb0ed604bc7562262078d75e1cdbd046cccfed4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8126 5580 bytes
font_01_sfnt_off0000941e.bin
2ac7eac9aa3be0e50f553901d49d1fdcdeba13ef58f7fc5a5422b42066ae80c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x941E 10008 bytes

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