Malicious PDF — malware analysis report

Static analysis result for SHA-256 bceeec1cb6c9a789…

MALICIOUS

PDF

43.0 KB Created: 2020-08-30 16:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30922b8c739c1a3f732f9397cba26dd9 SHA-1: 5aeb57a7037c72bb251267287bc6a7ff4e05b419 SHA-256: bceeec1cb6c9a78965cf660fee5e866271572c332bd49e35208321a749e85b04
152 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though corrupted, contains the URL that triggered the malicious redirector heuristic, suggesting the document's purpose is to lure users to malicious sites. No scripts were extracted from this sample.

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/wix?keyword=killings+by+andre+dubus+pdf
    • https://cdn.shopify.com/s/files/1/0429/8879/8111/files/bharatanatyam_costume_measurement_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/pojuwakexavebupavotokut.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/lanujuwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/83135567999.pdf
    • https://static.usrfiles.com/ugd/63d3ad_68bdaa1186834dd58743ee9fd049f161.pdf
    • https://static.usrfiles.com/ugd/b8c837_8643c4b1f748493db9efe68227e26d45.pdf
    • https://static.usrfiles.com/ugd/b8c837_66982b67d4c2464abc877d2469cd7e2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfcda2e4e5bd4a3d8b7503cf0da89f99.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_b481531c1a314f16926044d7b71cf755.pdf
    • https://static.usrfiles.com/ugd/e3ff21_8e65786330b44e7392253c10bf6d9936.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d17c65107c94a03ab9226ef1b37f8e8.pdf
    • https://static.usrfiles.com/ugd/b50c55_7aecda7362ba4efe8c1fdd8443055ed0.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/ruwinawo.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/58906717430.pdf
    • https://cdn.shopify.com/s/files/1/0457/3675/5356/files/gikazijisufa.pdf
    • https://cdn.shopify.com/s/files/1/0439/0918/5688/files/loredazopelus.pdf
    • https://cdn.shopify.com/s/files/1/0441/3957/7496/files/burapired.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_off00006a14.bin
04f64cfa5705c414984b69ec0bdd20f782768d94f108f248a3775738e453ce7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A14 5420 bytes
font_01_sfnt_off00007c91.bin
fcb00673f716059103caf1d1eb52245317c35a9a890f4227584349dacd6bd06b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C91 10192 bytes