Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f8613f230fedde4…

MALICIOUS

PDF

87.9 KB Created: 2020-09-06 14:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d63c07a0cf95071f59abfdfd54d61e0 SHA-1: c66943533286cf96a91f81ae2b6abec43abc3ae0 SHA-256: 5f8613f230fedde4ea4abdfc8de1d089675cb3a0e61f3f8d3ac01671d02e60cb
194 Risk Score

Malware Insights

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

The PDF contains a heuristic match for an advance-fee scam lure, presenting language related to prizes and large sums of money. It also contains numerous links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure.

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/wix?keyword=transformer+the+last+knight+megatron
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6258/2693/files/xaraxabuxewisebojubuji.pdf
    • https://cdn.shopify.com/s/files/1/0438/7491/0376/files/45722614656.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1071/files/lokusamutibijesonagapan.pdf
    • https://cdn.shopify.com/s/files/1/0433/3099/4326/files/72259331218.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2191/files/icai_ca_final_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/4055/5687/files/papujaxajefegebizuvo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0919/files/40618450815.pdf
    • https://cdn.shopify.com/s/files/1/0450/3810/8830/files/va_complaint_of_employment_discrimination_form.pdf
    • https://static.usrfiles.com/ugd/77d535_8657e7d168514b64b8ce424e0e4c191b.pdf
    • https://static.usrfiles.com/ugd/7e6083_761601d3135d4202b43ac82984d848db.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7fc0aac90114f2f9790db0244d9754e.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_3387822674984867bee304de4287bbe9.pdf
    • https://cdn.shopify.com/s/files/1/0435/2324/4191/files/assembly_drawing_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/7114/3078/files/wuzovedubogejumowuba.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/berliner_platz_1_neu_testheft.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d9b.bin
f782c9e20e94177f088f1e7e5146cba93cc88cf5702946a72f011d8e43c1b50c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9B 5192 bytes
font_01_sfnt_off00011f12.bin
228bbffb7d326fa39c832d4c4c0137d0c7235a55e2bcf3aa6ffa38aed17a9bdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F12 2764 bytes
font_02_sfnt_off00012aa7.bin
745b16f09a978c7198959acc69a80aea7fd5c09bc8fd4dc3a61535b3d4886be9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA7 11748 bytes

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