Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7c11429d0e8f7c…

MALICIOUS

PDF

46.1 KB Created: 2020-08-06 19:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c766c048ce89b7e3abed3024889f92b7 SHA-1: dcba12d1ffe517441462b60c69685f97c6df4906 SHA-256: 6e7c11429d0e8f7c2188f5b6350f40b5221491a622cccbf21621245b057a5f2f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed to generate traffic and potentially lead users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure, indicating a likely attempt to redirect users to harmful content. No scripts were extracted, but the structure suggests a phishing or SEO poisoning attack.

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.cc/pify?keyword=pendidikan+di+amerika+serikat+pdf
    • http://ravazod.theblossomtree.org/uploads/1/3/1/3/131383664/d54cb.pdf
    • http://files.kellergirlsbasketball.com/uploads/1/3/0/8/130874296/4316652.pdf
    • http://files.davidgarza.com/uploads/1/3/0/7/130775677/suvaxo.pdf
    • http://files.beingfrankblog.com/uploads/1/3/1/4/131482930/lozawipe.pdf
    • http://files.baylanders.org/uploads/1/3/1/4/131409909/kodupodiworaf_pafobipebowe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/bejijomofojukixuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/pedigajulewaredurixudiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8837/files/migemegoja.pdf
    • https://cdn.shopify.com/s/files/1/0438/8120/1819/files/86278311849.pdf
    • https://cdn.shopify.com/s/files/1/0438/0629/4176/files/31137524923.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/xovob.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/lewoxenuwesavuraves.pdf
    • https://cdn.shopify.com/s/files/1/0431/3281/3469/files/51825762447.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/559093088.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/mexekanibanupixuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/0923/5353/files/ancient_words_lyrics_and_chords.pdf
    • https://cdn.shopify.com/s/files/1/0435/2809/3856/files/75259622459.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000601b.bin
91849544cfd7539722438d36bdfcaefcb978c635dd4551e8c87f714cd3735fd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601B 5220 bytes
font_01_sfnt_off000071c8.bin
5b8d3f82aee3cb953dfd8913b1f920b544a2d03a933d86c85204d6af9d03aa9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C8 10672 bytes
font_02_sfnt_off00009671.bin
d78d7cc1a68daa951b4fbccbcfb906d5a08ad384f187125596154666a45abe72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9671 16060 bytes

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