Malicious PDF — malware analysis report

Static analysis result for SHA-256 efc2d96f869e52be…

MALICIOUS

PDF

51.1 KB Created: 2020-08-23 02:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 355f1d95fa038f0ad19333ea17a827f0 SHA-1: a4767a5944b92e8ecaab1b3271b105944bd0360b SHA-256: efc2d96f869e52be19865bf455e1597d0634a74748480a7f8daa82eb5892e614
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, specifically designed to impersonate educational result pages. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains text fragments related to 'Ssc result 2019 marksheet jessore board' and includes the malicious URL, reinforcing the lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or distribution mechanism for further payloads.

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=ssc+result+2019+marksheet+jessore+board
    • http://vunime.affinityhhc.com.au/uploads/1/3/0/8/130814328/cdde6e94e1.pdf
    • http://files.janetmacneil.com/uploads/1/3/0/7/130775557/698806.pdf
    • http://files.crikarsmarshall.com/uploads/1/3/2/7/132740260/xogapokorodarizivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7786/9476/files/nafubunasipiluzoniwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/xosazotodinivegemele.pdf
    • https://cdn.shopify.com/s/files/1/0438/4073/3341/files/aitsl_professional_standards.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9781/files/100_bamboo_sheets_costco.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/zaxodenebitetanujebexo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/vurogigiwi.pdf
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/39344653619.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/fuwupuvidefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/68461377917.pdf
    • https://cdn.shopify.com/s/files/1/0446/7235/2419/files/dokigin.pdf
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/98534670138.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/dororekizujem.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2645/files/16261629697.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/61907846381.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f25.bin
fb27b2ce62a52b65a1b98b70ab24fab49c4edeb2fac02e3ba027e79887ba0448		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F25 6044 bytes
font_01_sfnt_off00008385.bin
2c2dbdffb31fbd0bfb4fb9879b30a11d0c774ed68b8dcb05ca2ded8995b6c894		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8385 7588 bytes
font_02_sfnt_off00009b99.bin
d731ac2f69cbe2876a2bea224431620c1fb55b8e3f715a39d86a22a0c99bc78b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B99 10388 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.