Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0bae3e74f01de0…

MALICIOUS

PDF

46.8 KB Created: 2020-07-26 11:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2e9368fa24284b7694ea10db073454a SHA-1: 41c452d1f027eb0e2504998deb04e9b04184cd61 SHA-256: 5e0bae3e74f01de0f767349d278243ffa2dac11b03e4b95a761cac58a4455d76
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to 'time management worksheets'. The presence of embedded links and the ML classifier's high confidence indicate a malicious intent 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.com/wb?keyword=time%20management%20worksheets%20for%20middle%20school
    • http://files.polloperu.com/uploads/1/3/1/4/131407796/pales.pdf
    • http://files.cyclingadventures.net/uploads/1/3/2/6/132695689/sulexovabub_bubizelogu_mekodovi_pinuvawenun.pdf
    • http://files.jilliangreis.com/uploads/1/3/0/7/130739906/fanadetekev.pdf
    • http://files.edbjohnson.com/uploads/1/3/0/8/130815009/3078999d14ec6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/63153762532.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6312/files/20058774073.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/52697579989.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1142/files/97708339310.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/wavowogafexevut.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9854/files/kosumuwokibenifo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2430/8630/files/34250959577.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1778/files/zifugejomijukivosa.pdf
    • https://cdn.shopify.com/s/files/1/0440/9825/7048/files/ribefojawajedofusenejoman.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0305/files/33527632971.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/42706183414.pdf
    • https://cdn.shopify.com/s/files/1/0431/6030/5825/files/27284911554.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/74740501212.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_off00007922.bin
30398b2c2307b69e9148387d53f13d81390c2005a85d378e2e0c5f4855ea3bb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7922 5328 bytes
font_01_sfnt_off00008b1d.bin
63b57c28dba92b7f7368de19de6cab7963b0d9894f19650949f67084343606b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1D 10124 bytes

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