Malicious PDF — malware analysis report

Static analysis result for SHA-256 979b706c0fcaa1c0…

MALICIOUS

PDF

47.4 KB Created: 2020-08-12 13:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d787c65385def0a7740d8a6ee5895069 SHA-1: 5094c783c8e1396eccdd2b1e95e45674040a3b47 SHA-256: 979b706c0fcaa1c0ec00afa61c19c490674b39cef6511f4f9a0768822c796236
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'piano sheet music for beginners pdf' and the malicious URL itself, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many pointing to Shopify, likely to obscure the malicious redirector.

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=piano+sheet+music+for+beginners+pdf
    • http://files.floridapantherfestival.com/uploads/1/3/2/6/132695492/piwuwa.pdf
    • http://durajid.highimpactanalysis.com/uploads/1/3/1/3/131380600/c70fa.pdf
    • http://files.minnesotaironwoman.com/uploads/1/3/2/6/132681502/zorafopaziviv.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/zuvadepowujivedonaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/tamubo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3395/9327/files/iso_27001_internal_audit_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/barriers_to_effective_communication_in_the_workplace.pdf
    • https://cdn.shopify.com/s/files/1/0439/0325/4696/files/fazosiwevi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6637/files/82469710967.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0210/files/39309043570.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1185/files/soxirozozamejojosidijile.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/fodon.pdf
    • https://cdn.shopify.com/s/files/1/0429/5835/6639/files/33636922058.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2659/files/97505486060.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b6c.bin
12b7c7a4d8c467f3e9b6c6c06a362a09e1bd8678eb886cd684b2383f2f99ac54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6C 5560 bytes
font_01_sfnt_off00005e14.bin
eea94cdaa2a4b28d3129d35f90abed29a054530d15527d87def5952234f5308e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E14 14864 bytes
font_02_sfnt_off00008d2c.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2C 16204 bytes
font_03_sfnt_off0000a259.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA259 4324 bytes

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