Malicious PDF — malware analysis report

Static analysis result for SHA-256 72193c2481558e7a…

MALICIOUS

PDF

120.1 KB Created: 2020-08-12 14:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8e64029c6aa2f6d44f52fcbbee798b1 SHA-1: 5e419f1f7ff6b8d18db3f30006a5e1af7128cfe3 SHA-256: 72193c2481558e7ac2237257b46c944a78f0e94a6a28406f4cc299d25bfaa3be
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent URL, https://ttraff.com/pify?keyword=15.+3+applications+of+genetic+engineering+answers+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure.

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=15.+3+applications+of+genetic+engineering+answers+pdf
    • http://files.ohsmanuals.ca/uploads/1/3/1/4/131437464/kukojo.pdf
    • http://files.sensualstoriesforyou.com/uploads/1/3/2/7/132712163/732b84a5a24ef30.pdf
    • http://files.houstonnaturalbeekeepers.org/uploads/1/3/1/8/131856326/c13466b6282.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/sezipajonax.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/icy_veins_ret_pally.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8593/files/63255476084.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0430/5852/8405/files/jepikujo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.pdf
    • https://cdn.shopify.com/s/files/1/0440/1987/5998/files/green_smoothies_recipes_for_weight_loss.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/tv_listings_albany.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/84986255616.pdf
    • https://cdn.shopify.com/s/files/1/0434/0210/0886/files/47092180525.pdf
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/lukugamul.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/nixowidapanesivemubuvipu.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_off00019a6f.bin
95ba3156e1d10afc2e620a637e2c2785ce93d3692eb5c9adec4ba0e3793677da
pdf-font-stream PDF embedded font (sfnt) at offset 0x19A6F 5692 bytes
font_01_sfnt_off0001ade1.bin
d4b2f6120f7aa6e5c8e6de7314101f3652dddddc48ccf7ddbc7b6ff13264b01c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADE1 10612 bytes