Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cb7ae222d125d0…

MALICIOUS

PDF

69.3 KB Created: 2020-08-11 21:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7b4375dbebbccb4b604960e3209e6bc SHA-1: a0d5532b4017d4a28c9418c76507c5822f0ff0e3 SHA-256: 63cb7ae222d125d08a3f814438f14a3ce58e560c11056964881e2bdd1d45166a
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, suggesting a phishing or scam attempt. The embedded link `https://ttraff.cc/pify?keyword=egglettes+recipes+pdf` is a known malicious redirector. The document body, though heavily obfuscated, contains this URL, indicating an attempt to lure the user into clicking it. The presence of numerous external PDF links further supports the SEO link farm heuristic.

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=egglettes+recipes+pdf
    • http://files.odnws.com/uploads/1/3/1/8/131871799/pewotudaf.pdf
    • http://files.davidcopher.com/uploads/1/3/0/7/130739225/xevanonotu-wiwifis-gojidul.pdf
    • http://files.singularinsight.com/uploads/1/3/0/8/130874015/tifuxagadobaku_titiferemi_xipisufulit.pdf
    • http://files.ineslampreia.com/uploads/1/3/2/7/132712326/0a2a2aa.pdf
    • http://files.jonathanlipnick.com/uploads/1/3/0/7/130775009/7a45cae4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24413790208.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/dofipemojujafadujif.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2384/files/category_theory_awodey.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/27560730039.pdf
    • https://cdn.shopify.com/s/files/1/0440/7836/6885/files/36931059393.pdf
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/pamudutasefewe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87932640634.pdf
    • https://cdn.shopify.com/s/files/1/0432/7922/0891/files/juparefowani.pdf
    • https://cdn.shopify.com/s/files/1/0437/3030/5175/files/can_you_eat_sand_crabs.pdf
    • https://cdn.shopify.com/s/files/1/0437/7437/8142/files/reassembly_ship_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6027/files/admonitions_of_ipuwer.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4810/files/wufijekasikovibabowibib.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/wutefiman.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ee3.bin
e8ea80da0e9649baa017bfe5b87a8c0e20f7b5749341f027662e7c98dfebc5c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE3 26760 bytes
font_01_sfnt_off0000c17f.bin
2f62022cab600af2e7fc7e8012b0c5e4e2ca4e0064691c33e3d1bd7ad4c08397		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC17F 4644 bytes
font_02_sfnt_off0000d167.bin
61a299b0ff85e3cd051b598fbc35ad8be6a62ce5901952c708384ecc463a7f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD167 12568 bytes
font_03_sfnt_off0000f9ce.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CE 4324 bytes

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