Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6800a2dc72bba2…

MALICIOUS

PDF

45.9 KB Created: 2020-08-10 08:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e54af0661c8947ef7673ee8f2dd3d121 SHA-1: 6a8fe44de6d9d4a0bd81a38f045d84c8a36a1de2 SHA-256: 3a6800a2dc72bba20d99b0beeca8910745feae7307e6a8b71e051907101acb0c
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL disguised as an 'anganwadi form pdf haryana'. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic and the ML_NYX_PDF_MALICIOUS flag strongly indicate malicious intent. The primary malicious URL is https://ttraff.ru/pify?keyword=anganwadi+form+pdf+haryana, which likely leads to further malicious content. The presence of numerous other PDF links suggests a link farm designed to distribute malicious content or improve SEO for malicious sites.

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.ru/pify?keyword=anganwadi+form+pdf+haryana
    • http://naloxex.intempodanceensemble.org/uploads/1/3/0/7/130776757/nupijizigudadig-xisanifowe-solapa-jovimufudeweja.pdf
    • http://files.theinnaetkd.com/uploads/1/3/0/7/130775633/4942396.pdf
    • http://files.teamelitesports.com/uploads/1/3/1/3/131380848/5385974.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/ruvosukof.pdf
    • https://cdn.shopify.com/s/files/1/0437/4088/9240/files/16952317630.pdf
    • https://cdn.shopify.com/s/files/1/0437/0602/4090/files/fufafiwimepex.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/45937190568.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1317/files/43101386936.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5235/files/dajenuwedudi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/autobiography_of_mahatma_gandhi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/27466953877.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9561/files/30873304727.pdf
    • https://cdn.shopify.com/s/files/1/0436/9563/6633/files/5089305998.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_off000069ec.bin
729e99ce8dc212657fee8a9203c55d314329eaed785bc2a112b5900227b7b142
pdf-font-stream PDF embedded font (sfnt) at offset 0x69EC 5428 bytes
font_01_sfnt_off00007c57.bin
e9580e1641f655e332d3eb447d640d87745143c8da56dec5366d27ec6f4dcf4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C57 14940 bytes