Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e89a877b71f8717…

MALICIOUS

PDF

36.9 KB Created: 2020-08-06 06:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e5c0b2f52243b819a6d2ae89424bc09 SHA-1: b52a04e385eda2af21c3d77eeb8573faebbffe9f SHA-256: 2e89a877b71f87174047481c18b606939985d6def1958b698f491778060620b2
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body text, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=eragon+book+4+pdf+free+download', suggesting a lure for a free PDF download. This redirector likely serves to deliver a second-stage payload or initiate a phishing attempt.

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=eragon+book+4+pdf+free+download
    • http://files.cvillechambermusic.org/uploads/1/3/1/4/131483371/fedupujunoredo.pdf
    • http://files.dinas-decor.com/uploads/1/3/1/6/131637014/pizazexon_jomuxakura_fosukafuk.pdf
    • http://wonej.thecrossingfairfax.org/uploads/1/3/1/1/131163635/8627805.pdf
    • http://files.myerstownboyscouts.org/uploads/1/3/1/8/131871453/64739.pdf
    • http://files.iditarod100.org/uploads/1/3/1/3/131379039/b7de9.pdf
    • https://cdn.shopify.com/s/files/1/0430/4214/4407/files/64284845070.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/71939797949.pdf
    • https://cdn.shopify.com/s/files/1/0430/6658/9335/files/reddit_eight_bit_bailey.pdf
    • https://cdn.shopify.com/s/files/1/0435/2468/5975/files/42809078249.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0445/files/4247273526.pdf
    • https://cdn.shopify.com/s/files/1/0429/4112/0679/files/1476671407.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/vuroziwile.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/89761384779.pdf
    • https://cdn.shopify.com/s/files/1/0437/8558/4802/files/bon_mot_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8917749958.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5025/files/tovewigobutusifax.pdf
    • https://cdn.shopify.com/s/files/1/0439/2953/4632/files/levenshtein_distance_c.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/bodakasitoxujasij.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5351/files/rilaxidakemugowazizu.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_off00005274.bin
12dcd5baf191a1095d705ecde21fd0c2cc6e5fa22d24f08baf856230cb33af78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5274 5372 bytes
font_01_sfnt_off000064e9.bin
3da03e876038f7149a269424385719a242e9024a5393c20b51c98528927bd11c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E9 9828 bytes

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