Malicious PDF — malware analysis report

Static analysis result for SHA-256 7786b53613b48ad4…

MALICIOUS

PDF

51.4 KB Created: 2020-08-12 19:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a5ca5a7c5915356fd7ce63252f3f77e SHA-1: 37bf7b5460605155c5f5ef2a69e817aeb5a1219d SHA-256: 7786b53613b48ad447aef0a28684a3f1dc824ba3660a5bfbfe28b046510f8a36
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 redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=alagaupu+faasamoa+pdf, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL, suggesting an attempt to disguise malicious content as a legitimate document.

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.ru/pify?keyword=alagaupu+faasamoa+pdf
    • http://files.placescultures.com/uploads/1/3/2/7/132740614/sabixesilaliwuz.pdf
    • http://files.alexstudio.bg/uploads/1/3/1/1/131164448/875fbb5e4c12d5.pdf
    • http://files.elizabethkpetersonlab.com/uploads/1/3/1/3/131384789/sibufajoj-xuvini.pdf
    • http://fafixijix.wearecommunityfirst.org/uploads/1/3/0/9/130969130/vodozowavigo.pdf
    • http://files.mahajosh.com/uploads/1/3/1/4/131453456/ravixokugiguwom_womutezenufino.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8048/1954/files/search_engine_marketing_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6108/4322/files/crazy_frog_piano_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0447/8782/6854/files/worldview_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/sewota.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5625/files/23612395232.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/42151675119.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6840/files/gevakazeje.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/20488836605.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7118/files/bumem.pdf
    • https://cdn.shopify.com/s/files/1/0433/2018/0894/files/96536119111.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7582/files/joint_fleet_maintenance_manual.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_off00008bf1.bin
4208986765ea428cc750c0282351df3738426af03677ab66f39250a5e2055259		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF1 5256 bytes
font_01_sfnt_off00009dc1.bin
36204df78e461960f97ac93b5d9971ae7ccf31c8e5d565b1db85f7e994e9a092		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC1 10120 bytes

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