Malicious PDF — malware analysis report

Static analysis result for SHA-256 108faa07985b1b85…

MALICIOUS

PDF

42.6 KB Created: 2020-08-14 23:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08d6e25be4a6da06db9e4f6c81df941b SHA-1: f214306e7220d764901fedbf1fb348cab4ed0a03 SHA-256: 108faa07985b1b85dddc0ef2b2ecf935d5ee7f19630738f3b4d75650e826b79d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=peter+lynch+beating+the+street+pdf'. This redirector likely leads to a malicious payload or phishing page. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination and potentially leverage legitimate hosting for malicious purposes. The ML classifier strongly indicates malicious intent.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=peter+lynch+beating+the+street+pdf
    • http://files.buckinghamshirelandscapegardeners.com/uploads/1/3/0/7/130775607/4747481.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2772/5474/files/31026484126.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2755/files/8830496806.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3469/files/mevemiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3162/5882/files/xotik.pdf
    • https://cdn.shopify.com/s/files/1/0428/4570/0262/files/tofajovimeximuvebeze.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/28234615097.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdf
    • https://cdn.shopify.com/s/files/1/0438/1373/2512/files/xls_to_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/62005620710.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6949/files/serixibodu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/togof.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_off00006967.bin
8f1eb81ce8846a1ff894dd2d89df3f6f3592b7b6645be159035a924b238e2a1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6967 5660 bytes
font_01_sfnt_off00007c97.bin
e2b8ad65e3f386f4b331aab79b521924e17612b403b4212d0bf27070a5f912da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C97 9688 bytes

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