Malicious PDF — malware analysis report

Static analysis result for SHA-256 101a17c8985cd31f…

MALICIOUS

PDF

39.3 KB Created: 2020-08-11 21:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 578368bb99d812794219ae6c8d41b3b4 SHA-1: 30c7a2e8cc47784644fb1512461581d451f5d583 SHA-256: 101a17c8985cd31ffa63de50ddfd0fad9d0872a961e0ebe6f174b50a8450c0f1
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a lure to download potentially malicious content disguised as legitimate files.

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=the+art+of+war+book+pdf+download
    • http://ligikasar.mbellarchitects.com/uploads/1/3/1/4/131453247/vulosizezev.pdf
    • http://kenozim.kbshoppingcenter.com/uploads/1/3/0/7/130775085/3673829.pdf
    • http://files.artypantsstudiott.com/uploads/1/3/0/7/130739970/17482cba57.pdf
    • http://files.beginwithyourskinmedspa.com/uploads/1/3/1/0/131070378/7121771.pdf
    • http://files.lacluenvironment.com/uploads/1/3/1/4/131408142/f0aa32.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/82562328260.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/zolokavudowazimilebebebun.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/15559059976.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/86079045714.pdf
    • https://cdn.shopify.com/s/files/1/0433/5108/1118/files/purafezisafedinemefo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0127/2729/files/22902924884.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/daramarepifupa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/41822849980.pdf
    • https://cdn.shopify.com/s/files/1/0430/6246/0577/files/75651019434.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3381/files/44459166246.pdf
    • https://cdn.shopify.com/s/files/1/0433/7418/2563/files/99974933115.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/jajegivitajiluxidi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9585/8083/files/81943489067.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_off00005c0c.bin
4e1d22f5fd4afad809ceaa2596ce2706e5cede3c805ce45f18a72126ecb8fdd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0C 5196 bytes
font_01_sfnt_off00006dca.bin
df9bdc152a15c1fa593d0a0b4f1ec90e0beba94bcf8e5d143f516e2815ccdde3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCA 10040 bytes