Malicious PDF — malware analysis report

Static analysis result for SHA-256 a11307ce5fc37842…

MALICIOUS

PDF

35.0 KB Created: 2020-08-23 03:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e458e02c12f59d27254d7ac56154dc43 SHA-1: ebdd4e87e481200c4e3e0def68c2261e05dc8e7f SHA-256: a11307ce5fc37842314637c090766c62b0611b1cca650ee3e0ad41da6157683d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=mata+ji+ki+aarti'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the same spiritual reference and the malicious URL, reinforcing the lure.

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=mata+ji+ki+aarti
    • http://files.businessformedicareforall.org/uploads/1/3/1/4/131411596/6063172.pdf
    • http://derotowe.hadapaint.org/uploads/1/3/2/6/132681670/tudajukigesafa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8252/2528/files/color_hex_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8554/files/11056707744.pdf
    • https://cdn.shopify.com/s/files/1/0437/8578/1397/files/8786443286.pdf
    • https://cdn.shopify.com/s/files/1/0437/2588/1498/files/gikub.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/97833759919.pdf
    • https://cdn.shopify.com/s/files/1/0435/7203/5739/files/dsc_pk5501_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/new_metro_map_delhi_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/mirememiwebiledoxu.pdf
    • https://cdn.shopify.com/s/files/1/0448/3910/8770/files/93636361590.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_off00004e64.bin
3204378b75326922420cc3c7ed3e00db4744a0239b948e29a24e009d9b47d9b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E64 4616 bytes
font_01_sfnt_off00005e2e.bin
67fb72982c4c37b9847c934645d9d394c9fe6ce50fbfc3e7942735a55ecf081b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2E 9852 bytes

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