Malicious PDF — malware analysis report

Static analysis result for SHA-256 834d5f0723a77448…

MALICIOUS

PDF

45.5 KB Created: 2020-09-17 01:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95f31068943bf0df9acbae7189fe8e9c SHA-1: 8d161d9a7c6b1d632aab6ce811ced74917de08d0 SHA-256: 834d5f0723a7744821210657a22e84e8cfc84bd96655a35632e2c7c54ba5dae8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious domains. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector link suggests an attempt to lead the user to a compromised or malicious site. No scripts were extracted, but the document body and heuristics indicate a link farm designed to direct users to external content.

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.link/wix?keyword=sukhmani+sahib+paath+in+punjabi+written
    • http://files.showtimetravelegency.com/uploads/1/3/0/9/130969543/gokorixuxat.pdf
    • http://files.treestoseas.org/uploads/1/3/2/7/132712163/9791340.pdf
    • http://ravuronaj.tummystuffer101.com/uploads/1/3/0/7/130739431/timuwubow.pdf
    • http://kinag.carolinagreenindustrynetwork.com/uploads/1/3/1/4/131452976/tebazokomen_juwaruvovuxum_nikanijenuliz_ralaxukibebon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://f1598322-2ee7-4824-8aea-7ee174d25f2a.filesusr.com/ugd/4f270c_68922a73c0b74117a152b729c78849c7.pdf?index=true
    • https://9374d5ac-0fbc-4dcd-903c-069f2fde66af.filesusr.com/ugd/3d0627_0840beb47a104fdd9421f9ad6cf0a60c.pdf?index=true
    • https://87ed88b8-e5c4-4ee5-a525-a4d56549c501.filesusr.com/ugd/c88839_f699646d639f4b788fe3885a22f4a4c0.pdf?index=true
    • https://bc2f5dc2-3952-4a55-82a7-12bb7b594127.filesusr.com/ugd/1a1092_909c142eb91948fa909fc33a1fa28f5c.pdf?index=true
    • https://7e96b77e-0a9d-468f-ad2a-d277b47dc417.filesusr.com/ugd/ab63e3_ddb01740ddb94db1ba4eb76c82768f05.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/complete_list_of_cations_and_anions_and_their_charges.pdf
    • https://cdn.shopify.com/s/files/1/0428/6860/5095/files/karidagi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/nuxopiwerixativar.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/17388326649.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/rasunomelajibubibisawik.pdf
    • https://cdn.shopify.com/s/files/1/0483/8788/3160/files/the_anatomy_of_the_nephron_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/0144/4514/files/96438973389.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/88890662392.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/88176417818.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066b3.bin
b2655b0d89466cd4164cb4c850f4d37bba9fd30e38d16be18cbf3f64437bf2d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B3 5504 bytes
font_01_sfnt_off00007949.bin
c23c0b8a8ca70df618320004509ed375390853cb9734840c9389a43e258d16a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7949 3060 bytes
font_02_sfnt_off000085d7.bin
91a36f31ee00249339d7d26b3b1f9e29e35d8f381a19368463fe0452117f362b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D7 10056 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.