Malicious PDF — malware analysis report

Static analysis result for SHA-256 618a572e36962bd3…

MALICIOUS

PDF

42.0 KB Created: 2020-07-11 10:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 565c05211ed623ec279e94f299f7effd SHA-1: 552f2991c1c35cf1291038d5b8438bb04629a234 SHA-256: 618a572e36962bd3e470bf6aff745653de092111d7d44706cb9b80bdfc575b29
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, also contains URLs that appear to be part of a link farm. This suggests the primary purpose is to redirect users to malicious or spam-related websites.

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=apologize+one+republic+sheet+music+pdf
    • http://files.cozywritersroom.com/uploads/1/3/2/3/132302819/meveram.pdf
    • http://files.abqmobilenotary.com/uploads/1/3/0/7/130775859/pevukovax.pdf
    • http://files.gotmygoat.com/uploads/1/3/1/4/131453199/b394c37beab09.pdf
    • http://files.ilikai2120.com/uploads/1/3/2/6/132695874/345a33d.pdf
    • http://files.elkhartschoolofmusic.com/uploads/1/3/1/8/131871556/dorojuxiwat_gifovatuwube_rapewetaduw.pdf
    • http://files.restauranthibiscus.com/uploads/1/3/0/7/130776841/5106130.pdf
    • http://files.saverycreekfurniture.com/uploads/1/3/1/4/131437636/4f08052b71241.pdf
    • http://files.constantlyintouch.com/uploads/1/3/0/9/130969637/mefujeseg.pdf
    • http://files.daryljarod.com/uploads/1/3/1/4/131453176/mimodeda.pdf
    • http://files.someday-l.com/uploads/1/3/1/3/131398177/gifubusepegere_xotiwivix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://sulupovabas.files.wordpress.com/2020/07/44056734931.pdf
    • https://sudemep253065703.files.wordpress.com/2020/07/gefexado.pdf
    • https://vewulox.files.wordpress.com/2020/07/wevat.pdf
    • https://dapogudo.files.wordpress.com/2020/06/50596942891.pdf
    • https://sibowed.files.wordpress.com/2020/07/46273485357.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/67212338440.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55742160690.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xawifakupubegezixezo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000565d.bin
ebd60362c3e799880ac6edfa5e5aa3791a66c755145bdc654771c430a926adc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x565D 5420 bytes
font_01_sfnt_off00006898.bin
09609232fcf4e9925d30205373c5eeb1b5ed5926af309105ac9d10af308ca477		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6898 15392 bytes

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