Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3aa92d4a0eea0a…

MALICIOUS

PDF

46.0 KB Created: 2020-08-03 01:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ac50d80318b8fad8ac72dc2ee1709a0 SHA-1: 65bfb34a4297f38dd23c8c3fe22d37af68bbc0c1 SHA-256: be3aa92d4a0eea0a45bdf77bca18ce7952584257a10879cbb8acc6599679638f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to "West end star wars pdf". The ML classifier strongly indicated maliciousness, and the presence of a redirector suggests an attempt to lead the user to a malicious site. No scripts were extracted, limiting the analysis of specific execution techniques.

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=west+end+star+wars+pdf
    • http://files.shelleyhickox.com/uploads/1/3/0/9/130969999/sowalowudojawifom.pdf
    • http://files.jjsatthecopperpot.shop/uploads/1/3/1/8/131856276/ec874ec631.pdf
    • http://files.pacificfinishes.com/uploads/1/3/2/6/132696016/tegivuguniwaj.pdf
    • http://files.fractaldroid.com/uploads/1/3/0/7/130775953/4996981.pdf
    • http://nutipuv.diamondinstincts.com/uploads/1/3/1/4/131409309/sivugasefenaluvibad.pdf
    • https://cdn.shopify.com/s/files/1/0437/1234/8315/files/microsoft_document_imaging.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/61184352123.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/rebinebo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/sagipimewigif.pdf
    • https://cdn.shopify.com/s/files/1/0435/9890/5507/files/sogujizuforifegakis.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/53565283798.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2268/files/90407038929.pdf
    • https://cdn.shopify.com/s/files/1/0431/4601/8967/files/tunazomilin.pdf
    • https://cdn.shopify.com/s/files/1/0428/7725/5836/files/41516732249.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/vamolulalavaxev.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/18402714161.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_off0000763e.bin
ef727b8e551821ed6d941170fc74ba3d25c8f790781c139407fa09b02210419a
pdf-font-stream PDF embedded font (sfnt) at offset 0x763E 5108 bytes
font_01_sfnt_off000087c8.bin
0332b82cdb58b1196ba9a0f990c750bf44a9530b2a4f898bd92265b4de5c9236
pdf-font-stream PDF embedded font (sfnt) at offset 0x87C8 10220 bytes