Malicious PDF — malware analysis report

Static analysis result for SHA-256 b52403df4df8ed78…

MALICIOUS

PDF

39.2 KB Created: 2020-08-06 10:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c548992de79d78be8792afc2c249954c SHA-1: 715074f08d1622e1c97496986b3fbbbac0e9b7dd SHA-256: b52403df4df8ed78401cbe72c877afc12962bc508629bb017b597d2cbd40a5f8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many pointing to what appears to be a link farm hosted on ttraff.com. This infrastructure is designed to redirect users to other sites, likely for malicious purposes such as phishing or malware delivery. The ML classifier strongly supports the malicious nature of this PDF.

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=nunca+foi+sorte+livro+adriana+sant+anna+pdf
    • http://jokone.paulhuijing.com/uploads/1/3/1/6/131606260/2710205.pdf
    • http://files.inspiredinksbymadeline.com/uploads/1/3/1/3/131379928/gijati.pdf
    • http://files.edenbridgehockeyclub.co.uk/uploads/1/3/0/9/130969850/0e9b149b6dbb4.pdf
    • http://files.stoutcatching.com/uploads/1/3/1/4/131437736/towixutux.pdf
    • http://files.smrhoa.net/uploads/1/3/1/3/131398176/6173352.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/11873753830.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/70864876335.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/rolajel.pdf
    • https://cdn.shopify.com/s/files/1/0431/3668/0098/files/pumipebilapipanus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9950/5311/files/zefejavezirinep.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/51188658471.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/31169244157.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/34696263350.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/pmx_editor_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/best_ds_emulator_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/68671083970.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/94685662457.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000548c.bin
d457c5b21c3029360f641291016ef3a362b113b50d2409504f041121ae0fb241
pdf-font-stream PDF embedded font (sfnt) at offset 0x548C 5176 bytes
font_01_sfnt_off0000664d.bin
941265fa34f14dcceb554caea2ff84789f6fb4ffb3075139b3aff304c501642c
pdf-font-stream PDF embedded font (sfnt) at offset 0x664D 13196 bytes