Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67080d2b275b699…

MALICIOUS

PDF

44.3 KB Created: 2020-08-25 06:23:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbb4588e6dd6f455449bf5c2a0b6c6ba SHA-1: c37d8dedaed95a0dd6ae1b56485a400b598911fc SHA-256: b67080d2b275b69910caef85c6a0885ec1b4d7755e310175ddb2895466f7f345
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. The document body, though heavily corrupted, contains text that appears to be a lure for a 'Laplace m recipe guide'. This suggests the document is designed to trick users into clicking malicious links under the guise of providing useful content.

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=laplace+m+recipe+guide
    • http://dajesep.auditionwell.com/uploads/1/3/0/7/130776257/4677924.pdf
    • http://files.brainreachnorth.ca/uploads/1/3/2/7/132740545/3177202.pdf
    • http://files.markmademedia.com/uploads/1/3/1/4/131453291/tufijitenebawo-mevivirofekosu.pdf
    • http://duwemogeg.brandywinevalleyquilters.org/uploads/1/3/1/3/131398097/dc9201.pdf
    • https://cdn.shopify.com/s/files/1/0430/1425/8851/files/43750642073.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/pudanilukisevumi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2749/5072/files/vadumomatidakolebud.pdf
    • https://cdn.shopify.com/s/files/1/0431/6725/2629/files/rational_numbers_worksheet_grade_8_cbse.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/lafopulipusewuladuwowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/gusinazefasixesazitufova.pdf
    • https://cdn.shopify.com/s/files/1/0432/8846/1478/files/31487395014.pdf
    • https://cdn.shopify.com/s/files/1/0440/8823/0053/files/36804265529.pdf
    • https://cdn.shopify.com/s/files/1/0440/4481/2438/files/puraxukitalemefalifitox.pdf
    • https://cdn.shopify.com/s/files/1/0443/8360/0806/files/kubernetes_helm_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/1556/1638/files/dumaxositelidajesejepoto.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_off0000700e.bin
74e8ec7e9f5f7319d49b1e6c11221625a9ef7925bb0cfe582f8be022a599bbb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x700E 5156 bytes
font_01_sfnt_off0000817d.bin
de0ca2550d452d0d3687d9ca9e7c32221c77eb9f991c22ac4120cc9edae2c9ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x817D 10316 bytes