Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4eda1e1cea095c8…

MALICIOUS

PDF

35.9 KB Created: 2020-08-19 01:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b04154a9e631dac1b9f3498454af46fc SHA-1: ce9f7541670e37b39402b3fa0a16a4f502b9676f SHA-256: a4eda1e1cea095c864ecd4bf4f5bf399fc40cf5ec9c4f81e730c9905f63e93b5
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or unknown hosts. The document body, though heavily obfuscated, contains references to a popular movie and the malicious URL, suggesting a lure to trick users into clicking through to download malware. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics confirm the presence of malicious link farms.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=asoka+movie+hd+video+song
    • http://diname.wrapitexpress.com/uploads/1/3/1/6/131637240/e61417f2.pdf
    • http://files.connectexperiencewrite.com/uploads/1/3/1/4/131454549/ee96c95afa.pdf
    • http://jijiru.deltasierracds.com/uploads/1/3/2/7/132740580/9945614.pdf
    • http://tirokuk.milduraswimmingclub.com/uploads/1/3/0/9/130969744/tagelefexod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdf
    • https://cdn.shopify.com/s/files/1/0448/2108/6368/files/sinhala_alphabet_writing_practice.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4637/files/756677024.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/expert_report_inadmissible_hearsay.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/3rd_grade_math_review_packet.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/malopemax.pdf
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/hinduism_beliefs_and_practices.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0438/files/nomubetaxol.pdf
    • https://cdn.shopify.com/s/files/1/0432/3282/1412/files/87000950653.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/sotovimegunusopusanep.pdf
    • https://cdn.shopify.com/s/files/1/0437/6946/2935/files/jacobian_matrix_calculator.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_off00004f99.bin
005ce9251f4befec2a8ef92c23080d975c5bdd54f9a93fac15d35e2d4c3b39dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F99 5224 bytes
font_01_sfnt_off00006147.bin
dc2c26730c40022566c1943be0ead0535ba6b005835ed0aae324621b8fea66a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6147 9836 bytes

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